We have divided the complete CTET syllabus into several small posts on our website for your convenience. You will get their respective links in the related posts section provided below.
Explanation: This question asks which statement about the Food chain is incorrect, focusing on the arrangement of Organisms from producers to top-level consumers. In a Food chain, energy flows from producers to herbivores, then to carnivores, and sometimes to humans. Key concepts include trophic levels, producers (plants and some microorganisms), primary consumers (herbivores), secondary and tertiary consumers (carnivores), and the position of humans within Food chains. Step-by-step, one needs to analyze each statement and consider ecological principles: carnivores are typically at the top, herbivores occupy lower levels, producers synthesize their own Food, and humans can occupy multiple trophic levels depending on diet. For example, in a Forest ecosystem, plants are the primary producers, deer are herbivores, and tigers are carnivores at the top; humans may consume plants or animals, but they are not strictly a fixed trophic level. The essence of the question is to identify which assertion violates standard ecological understanding of energy flow. Overall, understanding trophic levels and the role of different Organisms in ecosystems helps determine the validity of each statement, highlighting the importance of producers and consumers in maintaining ecological balance.
Option b – Herbivores are present at the bottom of Food chain
In the lesson ‘Blow Hot Blow Cold’ by Dr. Zakir Hussain, at the time of his death, he was
a) Chief Justice of India
b) Vice-President of India
c) President of India
d) Prime Minister of India
Explanation: This question focuses on the position held by Dr. Zakir Hussain at the time of his death, testing knowledge of his life and contributions. Zakir Hussain was an eminent Indian statesman, educationist, and politician, known for his involvement in education and public service. Key concepts include the various offices in the Indian government: Chief Justice, Vice-President, President, and Prime Minister, and understanding the timeline of his career. Step-by-step reasoning involves recalling historical records and verifying the positions he held: he was closely associated with education before entering higher public office. By examining the sequence of Indian political History and his achievements, one can contextualize which office he occupied at the specific time of death. For example, his contributions to education and politics indicate a high-ranking role at the national level, distinguishing it from judicial or vice-presidential positions. Overall, recognizing the significance of his career helps connect the specific office he held with the broader understanding of Indian political leadership and legacy.
Option c – President of India
“People who have been living in the Forest for at least 25 years have a right to the Forest land and what is grown on it.” This is mandated by
a) The Constitution (Scheduled Castes) Orders (Amendment) Bill, 2012
Explanation: This question asks about the legal provision granting long-term Forest dwellers rights over land and its produce. Key concepts include Indian Forest laws, constitutional amendments, and the rights of tribal and Forest-dwelling communities. Step-by-step, one should identify which legislation specifically protects community rights and regulates access to Forest resources. Understanding the timeline of Forest-related legislation helps determine the act or amendment that formalized these rights. For instance, historical forest laws often prioritized state control, whereas modern legislation emphasizes the protection of local inhabitants’ livelihoods. Recognizing the purpose of such acts highlights the balance between conservation and Social justice. Overall, knowledge of forest law History and specific acts clarifies which legislation empowers people living in forests for extended periods.
Option c – The Right to Forest Act, 2007
Identify the type of farming described: “After cutting one crop, the land is left as it is for some years. Bamboos or weeds growing there are cut and burnt. The ash makes the land fertile. Seeds are sown by lightly digging, not plowing.”
a) Cooperative farming
b) Jhoom farming
c) Steep farming
d) Irrigation farming
Explanation: This question describes a traditional agricultural practice where land is left fallow for natural regeneration and fertility restoration. Key concepts include shifting cultivation, slash-and-burn techniques, and soil nutrient cycles. Step-by-step reasoning involves identifying the farming method based on land use pattern, crop rotation, and nutrient replenishment. The burning of weeds or vegetation adds ash to the soil, naturally enriching it, and minimal plowing reflects low-intensity manual Agriculture. For example, in certain hilly or forested regions, communities practice such cultivation to sustain soil fertility and manage resources sustainably. Overall, recognizing the method requires understanding how traditional farming practices use natural cycles for productivity.
Explanation: This question focuses on the definition of extinction in biological terms. Key concepts include species survival, global disappearance, and conservation status. Step-by-step reasoning involves analyzing the differences between endangered, rare, and extinct species. Extinction implies that a species is no longer present anywhere on Earth, unlike species facing threats or restricted to certain areas. For example, the dodo bird is a well-known case of extinction, as no living individuals exist. Overall, understanding extinction is essential for Biodiversity awareness and conservation planning.
Explanation: This question tests knowledge of environmental legislation and conservation acts in India. Key concepts include the Biodiversity Act, Wildlife Act, and conservation policies. Step-by-step reasoning requires matching each act with its purpose or year of enactment, recognizing how legal measures protect ecosystems, species, and Natural Resources. For instance, the Wildlife Protection Act safeguards endangered species, while the Biodiversity Act regulates access to biological resources. Understanding these connections helps identify correct legislative pairs. Overall, knowing the legal framework enables informed discussions about Biodiversity conservation in India.
Riya says: “It is a global body that looks after conservation of nature and gathers information on plants and animals.” Which organization is she referring to?
Explanation: This question asks to identify an international organization responsible for conservation and species data. Key concepts include global conservation bodies, Wildlife monitoring, and environmental protection frameworks. Step-by-step reasoning involves recalling major organizations and their roles, such as documenting endangered species and promoting Biodiversity conservation. For example, certain organizations maintain red lists and conservation guidelines for species worldwide. Understanding the distinction between research publications and international conservation agencies helps pinpoint the organization Riya refers to. Overall, awareness of global environmental institutions is crucial for interpreting such Questions.
Option c – IUCN
How many trophic levels are usually present in a Food chain?
a) One
b) Four
c) Numerous
d) Five
Explanation: This question examines the number of energy-transfer steps in a typical food chain. Key concepts include trophic levels, producers, consumers, and decomposers. Step-by-step reasoning involves understanding energy flow from primary producers to primary, secondary, and tertiary consumers, with each level representing a step where energy is transferred and lost. While food chains can vary, ecosystems typically show multiple interconnected levels before reaching apex predators. For instance, a forest chain may progress from plants to herbivores to carnivores. Overall, recognizing standard trophic structure helps visualize energy transfer and ecosystem dynamics.
Option d – Five
In a terrestrial ecosystem, green plants capture 1% of sunlight falling on their leaves and convert it into
Explanation: This question focuses on the efficiency of photosynthesis in converting Solar energy into chemical energy. Key concepts include Light energy absorption, energy conversion efficiency, and biomass production. Step-by-step reasoning involves understanding that plants use sunlight to synthesize Organic compounds through photosynthesis, storing energy in chemical bonds. Only a small fraction of sunlight is captured due to reflection, transmission, and inefficiencies in photosynthetic pigments. For example, in a meadow, only a portion of sunlight striking leaves contributes to carbohydrate production. Overall, this highlights the limited but crucial conversion of Solar energy into usable biological energy in ecosystems.
Option a – Food energy
How much energy is transferred from one consumer level to the next?
Explanation: This question concerns energy transfer efficiency between trophic levels. Key concepts include the 10% energy rule, primary and secondary consumers, and ecological pyramids. Step-by-step reasoning involves recognizing that energy decreases at each step due to Respiration, Heat loss, and metabolic processes, leaving only a fraction available to the next consumer. For example, if herbivores consume plants, only about 10% of the plant energy is converted into herbivore biomass for carnivores. Understanding energy loss explains why higher trophic levels support fewer individuals and emphasizes the importance of producers in sustaining ecosystems. Overall, this illustrates the principles of energy flow and efficiency in food chains.
Option c – 10% of the energy received
The process in which green plants and some blue-green algae make food from Inorganic substances using sunlight and chlorophyll is called
Explanation: This question asks for the term describing the synthesis of Organic food by autotrophic Organisms. Key concepts include photosynthesis, chlorophyll, Light-dependent reactions, and energy conversion. Step-by-step reasoning involves identifying the process where sunlight drives the conversion of carbon dioxide and water into carbohydrates and oxygen. For example, in a pond, algae use sunlight to produce glucose, which forms the Base of the aquatic food web. Understanding this process is crucial for explaining energy input into ecosystems and the role of producers. Overall, this highlights how autotrophs sustain ecological systems through energy capture and storage.
Option b – Photosynthesis
The interdependence of Organisms on other Organisms for sustenance is described by
a) Ecosystem
b) Biosphere
c) Food chains
d) Heterotrophs
Explanation: This question examines ecological relationships and dependencies among species. Key concepts include food chains, webs, ecosystems, and heterotrophy. Step-by-step reasoning involves analyzing interactions such as predation, herbivory, parasitism, and mutualism, which illustrate how organisms rely on others for nutrients and energy. For example, herbivores depend on plants, carnivores on herbivores, and decomposers recycle OrganicMatter. Recognizing these dependencies clarifies the flow of Matter and energy in ecosystems. Overall, the concept emphasizes the interconnected nature of organisms within ecological networks.
Option c – Food chains
Each step or level of a food chain forms a
a) Trophic level
b) Food web
c) Layer
d) Crust
Explanation: This question asks about the terminology for the hierarchical levels in a food chain. Key concepts include trophic levels, energy flow, producers, and consumers. Step-by-step reasoning involves recognizing that every step represents a position in the energy transfer sequence, starting from producers to herbivores, then to carnivores. For example, in a grass → rabbit → fox chain, grass forms the first level, rabbit the second, and fox the third. Understanding this structure clarifies energy distribution and ecosystem dynamics. Overall, each level signifies an organism group sharing the same function in energy transfer.
Option a – Trophic level
Interactions among various environmental components involve …………. from one component to another
a) Flow of hereditary information
b) Flow of food particles
c) Flow of energy
d) Flow of oxygen
Explanation: This question focuses on the mechanism by which ecosystems maintain connectivity among living and non-living components. Key concepts include energy flow, Matter cycles, and ecological interactions. Step-by-step reasoning highlights that energy captured by producers moves through consumers and decomposers, while non-living components supply nutrients and support these processes. For example, sunlight captured by plants converts to chemical energy, which passes to herbivores and carnivores. Understanding these flows emphasizes ecosystem balance. Overall, ecosystems rely on continuous transfer of energy between components to sustain life.
Option c – Flow of energy
Which statement is incorrect?
a) All green plants and blue-green algae are producers
b) Green plants get their food from Organic compounds
c) Producers prepare their own food from Inorganic compounds
d) Plants convert Solar energy into chemical energy
Explanation: This question asks to identify a misconception about producers and plants. Key concepts include photosynthesis, autotrophic Nutrition, and energy conversion. Step-by-step reasoning involves examining statements about plants and algae: all green plants and blue-green algae are producers, they synthesize food from Inorganic substances, and Solar energy is converted into chemical energy. Any statement claiming plants obtain food from Organic compounds contradicts basic photosynthesis principles. For example, chlorophyll-containing organisms capture sunlight to produce glucose, not by consuming Organic material. Overall, accurate understanding of producers is critical in Ecology.
Option b – Green plants get their food from Organic compounds
All interacting organisms in an area along with non-living components form a
Explanation: This question tests knowledge of ecological organization. Key concepts include biotic and abiotic components, ecosystem structure, and community interactions. Step-by-step reasoning involves identifying that an ecosystem includes both Living Organisms (plants, animals, microbes) and their physical Environment (soil, water, Climate). For example, a pond ecosystem contains fish, algae, and microorganisms interacting with water, sunlight, and nutrients. Understanding this structure is fundamental for studying energy flow, nutrient cycling, and ecological balance. Overall, ecosystems represent the integrated system of living and non-living components.
Option b – Ecosystem
An ecosystem consists of a biotic component comprising Living Organisms and
a) An abiotic component
b) Physical factors
c) Both (a) and (b)
d) None of these
Explanation: This question addresses the classification of ecosystem components. Key concepts include biotic and abiotic elements, interactions, and ecosystem functioning. Step-by-step reasoning involves recognizing that ecosystems have Living Organisms (biotic) and non-living elements (abiotic), such as sunlight, water, and Minerals. These components interact continuously: for example, plants (biotic) absorb water and Minerals (abiotic) for growth. Understanding both components is crucial to analyze energy flow, material cycles, and environmental responses. Overall, ecosystems are dynamic systems where biotic and abiotic factors co-exist.
Option c – Both (a) and (b)
Which is an abiotic component of an ecosystem?
a) Humus
b) Bacteria
c) Plants
d) Fungi
Explanation: This question requires distinguishing between living and non-living ecosystem elements. Key concepts include abiotic factors like soil, water, temperature, and sunlight. Step-by-step reasoning involves eliminating biotic options such as plants, fungi, or bacteria. Abiotic components influence organism survival, growth, and distribution. For example, temperature affects plant photosynthesis and microbial activity. Recognizing abiotic factors helps explain habitat conditions and ecological adaptations. Overall, understanding abiotic elements is key to analyzing ecosystem structure and function.
Option a – Humus
Who coined the term ecosystem?
a) Tansley
b) Odum
c) Warming
d) Darwin
Explanation: This question tests historical knowledge of ecological terminology. Key concepts include the development of Ecology as a science and contributions by notable ecologists. Step-by-step reasoning involves recalling that the term ecosystem was introduced to describe the combined biotic and abiotic Environment functioning as a unit. For example, the idea allows scientists to study energy flow, nutrient cycling, and organism interactions systematically. Recognizing the origin of terminology helps in understanding ecological frameworks and literature. Overall, coining the term formalized the study of integrated natural systems.
Option a – Tansley
Growth, reproduction, and other activities of Living Organisms are affected by
a) Abiotic components only
b) Biotic components only
c) Both biotic and abiotic components
d) Some other factors
Explanation: This question examines the factors influencing organismal Life Processes. Key concepts include biotic factors (interactions with other organisms) and abiotic factors (environmental conditions). Step-by-step reasoning involves identifying how both living and non-living elements impact metabolism, reproduction, and survival. For instance, availability of nutrients (abiotic) and presence of predators (biotic) shape Population dynamics. Understanding these influences helps predict ecological responses and species adaptation. Overall, organismal activities are shaped by a combination of environmental and biological factors.
Option c – Both biotic and abiotic components
Types of ecosystems include
a) Mountains and aquariums
b) Natural ecosystems like forests, ponds, and lakes
c) Artificial ecosystems like gardens and crop fields
d) Both (b) and (c)
Explanation: This question asks for classification of ecosystems. Key concepts include natural ecosystems (forests, lakes, ponds) and artificial ecosystems (gardens, crop fields). Step-by-step reasoning involves distinguishing between human-made and naturally occurring ecosystems, recognizing the interactions and energy flow in each type. For example, a forest ecosystem develops naturally with minimal human intervention, while a crop field is managed and altered by humans. Understanding ecosystem types aids in conservation, management, and ecological studies. Overall, ecosystems are categorized based on origin and human influence.
Option d – Both (b) and (c)
All consumers, whether herbivores, carnivores, or parasites, depend on ………. directly or indirectly for sustenance
Explanation: This question focuses on the dependence of consumers on producers for energy. Key concepts include trophic levels, energy flow, and food chains. Step-by-step reasoning involves recognizing that all consumers rely on plants (producers) either directly by consumption or indirectly through other consumers. For example, a carnivore eating herbivores indirectly depends on plants consumed by those herbivores. Understanding this dependency clarifies ecosystem connectivity and energy transfer. Overall, producers form the Base of all food chains, supporting higher trophic levels.
Option a – Producers or plants
Microorganisms that break down complex Organic substances of dead remains and waste into simpler Inorganic substances are called
a) Vultures
b) Decomposers
c) Omnivores
d) None of these
Explanation: This question asks about the role of decomposers in ecosystems. Key concepts include decomposition, nutrient cycling, and energy flow. Step-by-step reasoning involves recognizing that decomposers, such as bacteria and fungi, convert dead OrganicMatter into simpler Inorganic forms that can be reused by plants. For example, fallen leaves are broken down into humus, releasing nutrients like nitrogen and phosphorus. This process maintains soil fertility and ensures energy transfer continues in the ecosystem. Overall, decomposers are essential for recycling nutrients and sustaining life.
Option b – Decomposers
Accumulation of non-biodegradable pesticides in the food chain in increasing amounts at higher trophic levels is called
Explanation: This question focuses on the concept of biomagnification in ecosystems. Key concepts include food chains, trophic levels, and chemical accumulation. Step-by-step reasoning involves understanding that non-biodegradable substances, such as DDT, are not broken down by decomposers. As energy moves up the trophic levels, these substances accumulate in increasing concentrations. For example, small fish may ingest pesticide residues, which are then concentrated in larger fish and eventually in top predators. This process impacts ecosystem Health and human consumption. Overall, biomagnification demonstrates the environmental risk of persistent chemicals.
c) Convert Inorganic materials into organic compounds
d) Do not break down organic compounds
Explanation: This question examines the ecological function of decomposers. Key concepts include nutrient recycling, organic Matter breakdown, and ecosystem balance. Step-by-step reasoning involves understanding that decomposers convert complex organic substances into simpler Inorganic forms, making nutrients available for producers. For example, fungi break down fallen leaves, releasing nitrogen and phosphorus into the soil. This ensures that energy and materials are efficiently cycled through the ecosystem. Overall, decomposers maintain ecosystem stability by preventing nutrient loss.
Option b – Convert organic material to Inorganic forms
Carnivores represent
a) Primary consumers
b) Secondary and tertiary consumers
c) Reducers
d) Zooplankton
Explanation: This question asks about the trophic position of carnivores in a food chain. Key concepts include primary, secondary, and tertiary consumers, and energy flow. Step-by-step reasoning involves identifying that carnivores feed on herbivores or other carnivores, placing them at higher trophic levels. For example, a lion eating a deer is a secondary or tertiary consumer. Recognizing the trophic role of carnivores is important to understand Population control and ecosystem dynamics. Overall, carnivores occupy higher positions in food chains, regulating other species.
Option b – Secondary and tertiary consumers
Non-biodegradable waste includes
a) Garbage
b) Metallic articles
c) Sewage
d) Waste paper
Explanation: This question focuses on types of waste that do not decompose naturally. Key concepts include biodegradable vs. non-biodegradable materials, environmental impact, and persistence. Step-by-step reasoning involves identifying substances like plastics and Metals that resist decomposition, unlike organic materials such as food or leaves. For example, metallic cans and polythene bags remain in the Environment for decades. Understanding non-biodegradable waste is crucial for waste management and Pollution control. Overall, non-biodegradable waste accumulates and can disrupt ecosystems.
Option b – Metallic articles
In every food chain, green plants are
a) Decomposers
b) Producers
c) Consumers
d) None of the above
Explanation: This question examines the role of green plants in ecological systems. Key concepts include producers, autotrophs, photosynthesis, and energy capture. Step-by-step reasoning involves recognizing that green plants synthesize their own food from sunlight and inorganic materials, forming the Base of all food chains. For example, grasses capture Solar energy, which is then transferred to herbivores and higher-level consumers. Understanding this foundational role highlights the importance of producers in sustaining ecosystems. Overall, green plants form the energy Base for all trophic levels.
Option b – Producers
Which of the following is a non-biodegradable substance?
a) Polythene
b) Cotton cloth
c) Leaves
d) Vegetable peels
Explanation: This question asks to identify materials that do not decompose naturally. Key concepts include persistence of substances, environmental hazards, and waste classification. Step-by-step reasoning involves eliminating biodegradable materials like leaves and vegetable peels and identifying synthetic materials like polythene. Non-biodegradable substances accumulate in the Environment, potentially harming ecosystems and humans. For example, plastic bags can block waterways and affect aquatic life. Overall, recognizing non-biodegradable materials is essential for environmental management.
Option a – Polythene
Biodegradable substances are those that
a) Can be broken down by bacteria or other saprophytes
b) Cannot be acted upon by physical processes like Heat and pressure
Explanation: This question addresses the definition of biodegradable materials. Key concepts include natural decomposition, microorganisms, and nutrient cycling. Step-by-step reasoning involves recognizing that substances like food waste and plant residues can be broken down by bacteria, fungi, or other decomposers. For example, fallen leaves decompose over weeks, returning nutrients to the soil. Understanding biodegradability helps in waste management and composting practices. Overall, biodegradable materials are essential for maintaining ecosystem sustainability.
Option a – Can be broken down by bacteria or other saprophytes
Regarding species analysis, which is correct? i. More than 70% of species are animals; plants comprise 22% ii. Conventional taxonomic methods are the most reliable for microbial identification iii. Tropical Amazon rainforest has least Biodiversity iv. India’s diversity is 8.1% of global diversity
a) i and ii
b) ii and iii
c) iii and iv
d) i and iv
Explanation: This question tests knowledge of species distribution and biodiversity. Key concepts include global species composition, taxonomic methods, and regional biodiversity. Step-by-step reasoning involves evaluating each statement: animals dominate species numbers, conventional taxonomy is effective for microbes, the Amazon rainforest is highly diverse, and India holds significant global biodiversity. By comparing these statements, one can identify factual correctness. For example, biodiversity is highest in tropical regions, not lowest. Overall, understanding species distribution helps in conservation and ecological research.
Option d – i and iv
The introduction of Clarius gariepinus for aquaculture threatening native catfishes is an example of
a) Alien species invasion
b) Habitat fragmentation
c) Co-extinction
d) Overexploitation
Explanation: This question asks about ecological consequences of introducing non-native species. Key concepts include alien species, ecosystem disruption, and native species decline. Step-by-step reasoning involves recognizing that introducing Clarius gariepinus into habitats with native catfishes can lead to competition, predation, and habitat changes, threatening native populations. For example, Nile perch introduction in Lake Victoria caused similar extinctions. Understanding this concept highlights the risks of human interventions in ecosystems. Overall, alien species invasions can destabilize ecosystems and reduce native biodiversity.
Option a – Alien species invasion
The ‘Evil Quartet’ refers to
a) Species richness in a region
b) Four causes of biodiversity loss
c) Impacts of human activities
d) Conservation status of species
Explanation: This question asks about the concept used in biodiversity conservation. Key concepts include threats to biodiversity and human impact on ecosystems. Step-by-step reasoning involves identifying the four main causes that lead to species loss: habitat destruction, over-exploitation, alien species invasion, and co-extinction. For example, deforestation and introduction of invasive species are components of this quartet. Understanding these threats helps prioritize conservation efforts. Overall, the ‘Evil Quartet’ summarizes the primary human-induced causes of biodiversity loss.
Option b – Four causes of biodiversity loss
Which invasive fish in Lake Victoria caused the extinction of Cichlid fish?
a) Rohu
b) Nile perch
c) Catla
d) Clarias gariepinus
Explanation: This question deals with ecological impacts of invasive species. Key concepts include species introduction, food web disruption, and extinction. Step-by-step reasoning involves recognizing that introducing a predatory invasive fish into a stable ecosystem can outcompete or prey on native species, leading to their decline. In Lake Victoria, a non-native fish species disrupted the food chain, causing Cichlid extinction. This illustrates how invasive species can have cascading effects on native biodiversity. Overall, the example highlights the ecological risk of introducing non-native species.
Option b – Nile perch
Pick the incorrect statement:
a) Species diversity is uniformly distributed
b) Species diversity is highest in tropics, decreases toward poles
c) Species-area relationship is generally a rectangular hyperbolic function
d) Species richness and area relationship: log S = log C + Z log A
Explanation: This question requires evaluating statements about species diversity patterns. Key concepts include latitudinal biodiversity gradients and species-area relationships. Step-by-step reasoning involves noting that species diversity is generally higher in tropical regions and decreases toward the poles. Recognizing the correct form of the species-area relationship helps identify any inaccuracies. For example, diversity is not uniform across the globe but concentrated in certain regions. Overall, understanding global biodiversity patterns helps in ecological assessment and conservation planning.
Option a – Species diversity is uniformly distributed
Biodiversity-rich regions legally protected include
a) Biosphere reserves
b) National parks
c) Sanctuaries
d) All of these
Explanation: This question focuses on types of legally protected areas. Key concepts include biosphere reserves, national parks, and Wildlife sanctuaries. Step-by-step reasoning involves identifying that all these areas are established to conserve species and ecosystems under legal frameworks. For example, Gir National Park protects lions, while Nilgiri Biosphere Reserve conserves multiple ecosystems. Recognizing these categories is essential for understanding conservation mechanisms in India. Overall, legally protected areas safeguard biodiversity and support ecological balance.
Option d – All of these
Regarding number of biodiversity-rich regions in India, which is correct?
a) National parks > Biosphere reserves > Wildlife sanctuaries
b) Wildlife sanctuaries > National parks > Biosphere reserves
c) National parks > Wildlife sanctuaries > Biosphere reserves
d) Biosphere reserves > National parks > Wildlife sanctuaries
Explanation: This question tests knowledge of the distribution of protected areas. Key concepts include national parks, wildlife sanctuaries, and biosphere reserves. Step-by-step reasoning involves comparing the number of each type: India has more wildlife sanctuaries than national parks, and more national parks than biosphere reserves. Understanding this helps in grasping the structure of India’s biodiversity protection system. For example, the large number of sanctuaries indicates localized conservation efforts. Overall, India uses multiple protected area categories to preserve its biodiversity.
Option b –
The forests called the ‘Lungs of the planet Earth’ are
a) Tundra Forest
b) Amazon rainforest
c) Taiga Forest
d) Temperate grassland
Explanation: This question examines the global ecological significance of forests. Key concepts include oxygen production, carbon sequestration, and rainforest ecosystems. Step-by-step reasoning involves recognizing that certain forests, especially tropical rainforests like the Amazon, produce a significant portion of atmospheric oxygen and help regulate global Climate. For example, the Amazon rainforest generates oxygen while absorbing carbon dioxide. Overall, these forests are vital for maintaining atmospheric balance and supporting life on Earth.
Option b – Amazon rainforest
Identify the incorrect statement:
a) Biodiversity term popularized by Edward Wilson
b) Genetic diversity refers to diversity at genetic level shown by single species over range
c) Eastern Ghats have greater amphibian diversity than Western Ghats
d) Our biosphere shows heterogeneity
Explanation: This question tests knowledge of biodiversity and its distribution. Key concepts include genetic diversity, regional biodiversity, and influential scientists. Step-by-step reasoning involves evaluating claims about biodiversity hotspots, such as Eastern vs. Western Ghats amphibian diversity, and noting contributions of scientists like Edward Wilson. For example, the Western Ghats are known for high amphibian diversity, not Eastern Ghats. Overall, understanding regional biodiversity patterns helps target conservation priorities.
Option c – Eastern Ghats have greater amphibian diversity than Western Ghats
According to Robert May, global species diversity is about
a) 5 lakhs
b) 7 million
c) 20–25 million
d) 50–60 million
Explanation: This question focuses on estimates of global species diversity. Key concepts include species counts, biodiversity assessment, and ecological research. Step-by-step reasoning involves recognizing that biologists like Robert May have estimated millions of species globally, most of which are yet to be described. For example, microbial diversity far exceeds that of visible flora and fauna. Such estimates help in understanding the scale of biodiversity and planning conservation. Overall, global species diversity is vast, highlighting the need for preservation.
Option b – 7 million
Which of the following is incorrect?
a) More than 15,500 species face extinction worldwide
b) India has 50,000 rice strains and 1,000 mango varieties
c) IUCN 2004: estimated total species > 1.5 million
d) Temperate or polar areas harbor more species than tropics
Explanation: This question asks to identify inaccurate statements about species and biodiversity. Key concepts include extinction risks, crop varieties, and global species counts. Step-by-step reasoning involves evaluating claims such as numbers of rice strains, mango varieties, and global species totals, and comparing tropical vs. temperate species richness. Recognizing which statement conflicts with known facts allows for proper assessment. For example, temperate areas do not harbor more species than tropical areas. Overall, evaluating biodiversity data ensures accurate understanding of species distribution.
Option d – Temperate or polar areas harbor more species than tropics
Identify the incorrect statement:
a) ‘Rivet Popper Hypothesis’ was given by Alexander Von Humboldt
b) Loss of key species affects entire ecosystem
c) In-situ conservation is on-site biodiversity conservation
d) Vulnerable species are abundant but may become endangered due to habitat destruction
Explanation: This question tests knowledge of conservation Biology concepts. Key concepts include hypotheses on biodiversity, conservation strategies, and species vulnerability. Step-by-step reasoning involves assessing claims about the Rivet Popper Hypothesis, in-situ conservation, and species abundance. For example, misattribution of hypotheses or misunderstanding conservation methods would indicate incorrect statements. Overall, evaluating theoretical and practical aspects of biodiversity helps clarify correct scientific understanding.
Option a – ‘Rivet Popper Hypothesis’ was given by Alexander Von Humboldt
Dachigam National Park is famous for
a) Kashmir red stag (Hungul)
b) Great Indian bustard
c) One-horned rhinoceros
d) Tiger
Explanation: This question asks about the key species associated with a specific national park. Key concepts include endemic species and regional biodiversity. Step-by-step reasoning involves identifying species that are characteristic of the park’s ecosystem. For example, some national parks are established primarily to protect a flagship species. Recognizing the ecological importance of such species helps in conservation planning. Overall, Dachigam National Park is known for its iconic wildlife that requires habitat protection.
Option a – Kashmir red stag (Hungul)
‘Rivet Popper Hypothesis’ explains
a) Biodiversity richness essential for ecosystem Health and human survival
b) Loss of few species initially has no effect, but beyond a point, affects ecosystem functioning
c) Increased diversity contributes to high productivity
d) Areas with more species show variation in productivity year to year
Explanation: This question deals with ecological theories about biodiversity and ecosystem stability. Key concepts include the relationship between species richness and ecosystem functioning. Step-by-step reasoning involves understanding that the hypothesis compares species to rivets in an airplane: losing a few may have little impact initially, but beyond a threshold, ecosystem functions can collapse. For example, each species contributes to ecological balance, and cumulative losses affect productivity. Overall, the hypothesis emphasizes the critical role of biodiversity in ecosystem Health.
Option b – Loss of few species initially has no effect, but beyond a point, affects ecosystem functioning
Coevolved plant-pollinator mutualism illustrates
a) Prey-predator relationship
b) Co-extinction
c) Parasitism
d) Alien species invasion
Explanation: This question examines ecological interactions. Key concepts include mutualism, co-Evolution, and species interdependence. Step-by-step reasoning involves recognizing that coevolved relationships, such as specific plants and their pollinators, benefit both parties without harm. For example, bees pollinating flowers while obtaining nectar demonstrate mutual dependence. Such interactions highlight evolutionary adaptations that maintain ecosystem balance. Overall, coevolved mutualism reflects the interconnectedness of species for survival and reproduction.
Option b – Co-extinction
Timber harvesting and cultivation of land are permitted in
a) National park
b) Core area of biosphere reserve
c) Wildlife sanctuaries
d) All of these
Explanation: This question addresses rules governing land use in protected areas. Key concepts include types of protected regions, conservation regulations, and permissible human activities. Step-by-step reasoning involves identifying which areas allow resource use: national parks typically restrict exploitation, whereas wildlife sanctuaries and some biosphere reserve zones permit regulated harvesting. For example, core areas are strictly protected, while buffer zones may allow sustainable use. Overall, understanding these regulations ensures proper management of Natural Resources.
Option c – Wildlife sanctuaries
Tilman’s experiments showed
a) Extinction across taxa is random
b) Increased diversity contributes to higher productivity
c) Loss of biodiversity affects ecosystem functioning
d) Presence of invasive species endangers native species
Explanation: This question focuses on experimental Ecology related to biodiversity. Key concepts include species richness, productivity, and ecosystem functioning. Step-by-step reasoning involves understanding that Tilman’s studies demonstrated how increased diversity enhances productivity and stability, and that species loss can affect ecosystem processes. For example, plots with higher plant diversity showed greater biomass production than monocultures. Overall, these experiments highlight the practical significance of maintaining biodiversity for ecological Health.
Option b – Increased diversity contributes to higher productivity
In species-area relationship equation log S = log C + Z log A, Z value for very large areas ranges from
a) 0.1 to 0.2
b) 0.6 to 1.2
c) 1.5 to 2
d) 2.5 to 3.5
Explanation: This question involves the species-area relationship in Ecology. Key concepts include logarithmic equations describing species richness and the influence of habitat area. Step-by-step reasoning involves recognizing that as habitat area increases, species richness increases logarithmically, and the Z-value represents the slope for large areas. For example, a larger forest supports more species due to habitat heterogeneity. Overall, this equation helps predict biodiversity patterns across spatial scales.
Option b – 0.6 to 1.2
Group correctly including invasive weed species
a) Quagga, Parthenium, Water hyacinth
b) Carrot grass, Lantana, Eichhornia
c) Thylacine, Carrot grass, Lantana
d) Quagga, Parthenium, Carrot grass
Explanation: This question tests knowledge of invasive plant species. Key concepts include ecological invasions, native vs. alien species, and environmental impact. Step-by-step reasoning involves identifying weeds that are invasive and disrupt local ecosystems. For example, species like Parthenium and Water hyacinth spread aggressively and outcompete native vegetation. Recognizing these species aids in ecosystem management. Overall, correctly grouping invasive species helps in understanding threats to biodiversity.
Option b – Carrot grass, Lantana, Eichhornia
National Park not undertaking tiger conservation
a) Gir National Park
b) Kanha National Park
c) Sundarbans National Park
d) Corbett National Park
Explanation: This question concerns conservation priorities across protected areas. Key concepts include flagship species and management focus. Step-by-step reasoning involves identifying parks with primary tiger conservation programs versus those that protect other species. For example, some parks are established for other wildlife, even though tigers may inhabit them. Overall, recognizing the conservation focus of different parks highlights strategic wildlife management.
Option a – Gir National Park
Steller’s sea cow was native to
a) Mauritius
b) South Africa
c) Russia
d) Java
Explanation: This question examines historical species distribution. Key concepts include extinct marine mammals, native habitats, and human-induced extinction. Step-by-step reasoning involves locating the natural range of the species before hunting caused its extinction. For example, Steller’s sea cow inhabited specific cold-water regions. Understanding its native habitat illustrates the importance of geographical knowledge in conservation History. Overall, recognizing extinct species and their ranges aids in studying human impacts on biodiversity.
Option c – Russia
Species-area relationship described by
a) J. Grinnell
b) Paul Ehrlich
c) Alexander Von Humboldt
d) Robert May
Explanation: This question focuses on the origin of ecological theories. Key concepts include the relationship between habitat area and species richness, and contributions of early ecologists. Step-by-step reasoning involves identifying the scientist who formalized observations about how larger areas support more species, using empirical and theoretical studies. For example, Alexander Von Humboldt conducted early studies linking area and biodiversity. Overall, the species-area relationship is a fundamental concept in Ecology for predicting species richness.
Option c – Alexander Von Humboldt
According to IUCN Red List, Red Panda is
a) Endangered
b) Indeterminate
c) Extinct
d) Vulnerable
Explanation: This question deals with conservation status classification. Key concepts include the IUCN Red List categories, which indicate species risk levels such as endangered, vulnerable, or extinct. Step-by-step reasoning involves understanding that species are assessed based on Population size, habitat range, and threats. For example, some mammals face declining populations due to habitat loss and poaching. Knowing the status of species like the Red Panda helps prioritize conservation efforts. Overall, the Red List serves as a global benchmark for species protection.
Option a – Endangered
Ex-situ conservation methods include
a) Botanical gardens
b) Zoological parks
c) Cryopreservation
d) All of these
Explanation: This question examines approaches to biodiversity conservation outside natural habitats. Key concepts include botanical gardens, zoological parks, and cryopreservation. Step-by-step reasoning involves recognizing that ex-situ methods protect species when their natural habitat is threatened. For example, seeds preserved in seed banks or animals in zoos are safeguarded for potential reintroduction. These methods complement in-situ strategies and ensure survival of threatened species. Overall, ex-situ conservation maintains genetic diversity and supports species recovery programs.
Option d – All of these
Great Indian Bustard is protected in
a) Bandipur National Park
b) Gir National Park
c) Nandadevi National Park
d) Desert National Park
Explanation: This question focuses on species-specific protection measures. Key concepts include endangered species, habitat protection, and regional conservation initiatives. Step-by-step reasoning involves identifying the national park or sanctuary where the species is legally protected and habitat management practices are implemented. For example, certain arid regions support the survival of this bird. Overall, targeted protection ensures the persistence of critically endangered species and prevents extinction.
Option d – Desert National Park
Regarding insects and fungi species diversity:
a) Both statements correct
b) Only statement I correct
c) Only statement II correct
d) Both incorrect
Explanation: This question assesses the understanding of species richness in different taxonomic groups. Key concepts include diversity measures, ecological distribution, and relative abundance. Step-by-step reasoning involves analyzing two statements: whether both, one, or none correctly reflect actual species counts and global diversity patterns. For example, fungi and insect species are highly diverse and ecologically significant. Overall, accurate knowledge of biodiversity helps in ecological monitoring and conservation planning.
Option a – Both statements correct
Statement/s NOT true for a stable community:
a) Must be resistant or resilient to disturbances
b) Must resist invasion by alien species
c) Should show great variation in productivity from year to year
d) Both (a) and (c)
Explanation: This question is about ecological stability and community dynamics. Key concepts include resilience, resistance, productivity, and invasibility. Step-by-step reasoning involves identifying characteristics of a stable community, such as low variation in productivity, resistance to disturbances, and minimal invasion by alien species. Statements contradicting these principles indicate instability. For example, a community showing high year-to-year productivity variation may be unstable. Overall, recognizing traits of stable communities is essential for ecosystem management.
Option c – Should show great variation in productivity from year to year
Main reason for extinction of Steller’s cow and passenger pigeon
a) Habitat loss
b) Over-exploitation
c) Alien species invasions
d) Co-extinctions
Explanation: This question examines causes of historical species extinctions. Key concepts include over-exploitation, habitat destruction, alien species invasion, and co-extinction. Step-by-step reasoning involves understanding that excessive human hunting and exploitation led to Population decline and eventual extinction. For example, commercial hunting for meat and fur played a major role. Overall, these cases illustrate the impact of human activities on species survival.
Explanation: This question asks about a major global environmental conference. Key concepts include sustainable development, international agreements, and biodiversity conservation. Step-by-step reasoning involves recalling that the Earth Summit, or UN Conference on Environment and Development (UNCED), was a landmark event where nations agreed on frameworks like Agenda 21. For example, international collaboration during this summit aimed to address global environmental challenges. Overall, the Earth Summit was pivotal for global environmental policy.
Option d – Rio de Janeiro
Conservation of endangered species outside natural habitats is done in
a) Zoological Parks
b) National Parks
c) Wildlife Sanctuaries
d) Biosphere Reserves
Explanation: This question addresses ex-situ conservation strategies. Key concepts include zoos, wildlife parks, botanical gardens, and seed banks. Step-by-step reasoning involves understanding that these facilities provide controlled environments for breeding, maintaining, and studying threatened species away from natural threats. For example, zoological parks maintain populations of endangered mammals for potential reintroduction. Overall, ex-situ methods complement in-situ strategies to ensure species survival.
Option a – Zoological Parks
Cryopreservation technique preserves
a) Gametes of threatened species
b) Seeds of plants
c) Protected forest tracts
d) Plants via soil-less cultures
Explanation: This question focuses on a specific ex-situ conservation method. Key concepts include freezing biological material, genetic preservation, and long-term storage. Step-by-step reasoning involves recognizing that cryopreservation maintains gametes, seeds, or tissues at extremely low temperatures to prevent degradation. For example, freezing sperm or seeds allows future reproduction even if natural populations decline. Overall, this technique safeguards genetic resources and contributes to species conservation.
Option a – Gametes of threatened species
Group exhibiting more species diversity
a) Mosses
b) Angiosperms
c) Algae
d) Lichens
Explanation: This question tests knowledge of biodiversity among plant groups. Key concepts include species richness, evolutionary adaptation, and ecological niches. Step-by-step reasoning involves comparing groups like mosses, algae, angiosperms, and lichens, and recognizing which has the highest number of species. For example, flowering plants (angiosperms) have evolved diverse forms to occupy varied habitats. Overall, understanding species richness helps prioritize conservation and study ecological dynamics.
Option b – Angiosperms
Aravalli Hills, Western Ghats, Khasi and Jaintia hills are protected as
a) Sacred groves
b) Wildlife sanctuaries
c) Biosphere reserves
d) National parks
Explanation: This question focuses on the type of protected areas for important biodiversity regions. Key concepts include sacred groves, wildlife sanctuaries, biosphere reserves, and national parks. Step-by-step reasoning involves identifying that certain ecologically sensitive regions are designated as biosphere reserves to conserve diverse species and ecosystems. For example, the Western Ghats are recognized as a UNESCO World Heritage Site due to high endemism. Overall, biosphere reserves balance conservation with sustainable human activities.
Option a – Sacred groves
Water Hyacinth and Carrot grass are
a) Eichhornia and Parthenium
b) Rauwolfia and Parthenium
c) Lantana and Eichhornia
d) Rauwolfia and Lantana
Explanation: This question tests the identification of invasive plant species. Key concepts include alien species, ecological threats, and competition with native plants. Step-by-step reasoning involves recognizing that Water Hyacinth (Eichhornia) and Carrot grass (Parthenium) spread rapidly, disrupt aquatic and terrestrial ecosystems, and affect native biodiversity. For example, dense mats of Water Hyacinth reduce oxygen in water bodies. Overall, understanding invasive species helps in managing and protecting ecosystems.
Option a – Eichhornia and Parthenium
Select the incorrect match:
a) Kanha National Park – Kashmir red stag
b) Kaziranga National Park – One-horned rhinoceros
c) Periyar National Park – Elephant
d) Corbett National Park – Tiger
Explanation: This question examines the association of flagship species with their respective national parks. Key concepts include endemic species, conservation focus, and park-specific wildlife. Step-by-step reasoning involves knowing which species are characteristic of which park. For example, the One-horned rhinoceros is iconic to Kaziranga, while the tiger is linked to Corbett. Incorrect matches highlight misunderstandings of species distribution. Overall, correct associations are vital for targeted conservation planning.
Option a – Kanha National Park – Kashmir red stag
Correct statement about biodiversity hotspots
a) Areas with high endemism
b) Areas with low species diversity
c) Off-site method of conservation
d) Species found commonly in other areas
Explanation: This question addresses the criteria for biodiversity hotspots. Key concepts include endemism, species richness, and ecological significance. Step-by-step reasoning involves understanding that hotspots are regions with high numbers of unique species and significant habitat loss. For example, the Western Ghats and Himalayas in India are recognized for high endemism. Overall, identifying biodiversity hotspots helps prioritize conservation efforts effectively.
Explanation: This question deals with global species threat documentation. Key concepts include threatened species categories, conservation priorities, and management strategies. Step-by-step reasoning involves recognizing that the IUCN Red List compiles information on plants and animals at risk of extinction to guide protection measures. For example, it categorizes species as endangered, vulnerable, or critically endangered. Overall, the Red List is a fundamental tool in biodiversity conservation worldwide.
Option a – List of threatened plant and Animal species
Loss of biodiversity may cause
a) Decline in plant production
b) Lowered resistance to environmental perturbations
c) Increased variability in ecosystems
d) All of the above
Explanation: This question examines ecological consequences of reduced species diversity. Key concepts include ecosystem productivity, resilience, and stability. Step-by-step reasoning involves understanding that biodiversity loss can lower plant production, reduce ecosystem resistance to disturbances, and increase variability in ecosystem functions. For example, monocultures are more vulnerable to pests than diverse ecosystems. Overall, biodiversity is crucial for sustaining ecosystem services and ecological balance.
Option d – All of the above
India has more than 1,000 mango varieties due to
a) In-situ conservation
b) Genetic diversity
c) Biodiversity conservation
d) Hybridization
Explanation: This question focuses on the source of genetic diversity in cultivated crops. Key concepts include in-situ conservation, genetic variation, and traditional cultivation practices. Step-by-step reasoning involves recognizing that wide diversity of mango varieties in India arises from natural genetic variability and selective cultivation over generations. For example, local farmers maintain indigenous varieties in different agro-climatic regions. Overall, genetic diversity ensures food security and resilience.
Option b – Genetic diversity
Narrowly utilitarian arguments for biodiversity conservation include
a) Medicinal products, food, firewood, industrial products
b) Ecosystem services, pollinators, moral duty
c) All of the above
d) Only i, iv, and v
Explanation: This question concerns the practical reasons for conserving biodiversity. Key concepts include medicinal resources, food supply, industrial products, ecosystem services, and moral obligations. Step-by-step reasoning involves distinguishing narrowly utilitarian arguments, which emphasize direct human benefits such as medicines, timber, and food, versus broader ecological or ethical reasons. For example, conserving pollinators ensures crop productivity. Overall, utilitarian perspectives justify conservation based on tangible benefits.
Explanation: This question focuses on differentiating conservation approaches. Key concepts include in-situ (on-site) and ex-situ (off-site) methods. Step-by-step reasoning involves understanding that in-situ conservation protects species within natural habitats, such as national parks and wildlife sanctuaries, whereas off-site methods include botanical gardens and Culture collections. For example, maintaining a seed Bank is ex-situ conservation. Overall, distinguishing these methods aids in proper biodiversity management.
Explanation: This question examines global patterns in species richness. Key concepts include latitudinal gradients, biodiversity distribution, and ecological factors. Step-by-step reasoning involves recognizing that species diversity is highest near the equator due to stable Climate, productivity, and habitat complexity, and it decreases toward the poles. For example, tropical rainforests host far more species than tundra regions. Overall, understanding these patterns helps in global conservation planning.
Option b – Equator → Poles
Cause of species extinction NOT included in ‘Evil Quartet’
a) Co-extinction
b) Climatic change
c) Over-exploitation
d) Alien species invasion
Explanation: This question addresses the “Evil Quartet,” which lists major human-induced causes of species extinction: habitat loss, over-exploitation, alien species invasion, and co-extinction. Step-by-step reasoning involves identifying which option is not part of this framework. For example, climatic changes, while impactful, are not included in the original four causes described by Pimm. Overall, understanding the Evil Quartet helps in targeting conservation efforts effectively.
Option b – Climatic change
Species NOT affecting native species growth
a) Lantana
b) Eichhornia
c) Parthenium
d) Cichlid fish
Explanation: This question focuses on the ecological impact of invasive species. Key concepts include competition, ecosystem disruption, and invasive plant and Animal species. Step-by-step reasoning involves recognizing which species listed do not negatively influence native species’ growth or survival. For example, some species coexist without disrupting the local ecosystem. Overall, identifying non-impactful species helps prioritize management of invasive threats.
Option d – Cichlid fish
Oldest and largest national park in Maharashtra
a) Bandipur National Park
b) Tadoba National Park
c) Gir National Park
d) Sunderban National Park
Explanation: This question tests knowledge of protected areas in India. Key concepts include national park establishment, size, and ecological significance. Step-by-step reasoning involves recalling which park in Maharashtra was the earliest and largest designated for wildlife protection. For example, this park hosts diverse flora and fauna and serves as a conservation model. Overall, knowing historical parks helps understand India’s conservation History.
Option b – Tadoba National Park
Which is correct regarding a stable community?
a) Does not show much variation in productivity
b) Must be resilient to occasional disturbances
c) Must resist invasion by alien species
d) All of these
Explanation: This question examines characteristics of a stable ecological community. Key concepts include resistance, resilience, and productivity stability. Step-by-step reasoning involves identifying traits such as minimal variation in productivity over time, the ability to withstand disturbances, and resistance to alien species invasion. For example, a forest ecosystem that maintains consistent species interactions over years reflects stability. Overall, understanding stable communities aids ecosystem management.
Option d – All of these
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My name is Vamshi Krishna and I am from Kamareddy, a district in Telangana. I am a graduate and by profession, I am an android app developer and also interested in blogging.
