Although India’s human Population is expanding rapidly, the number of birds is decreasing due to which of the following reasons?. I. A rise in hunting activities II. Widespread use of Organic farming methods III. Major loss of bird habitats IV. Excessive use of pesticides, chemical fertilizers, and mosquito repellents
a) I and II are correct
b) II and III are correct
c) III and IV are correct
d) I and IV are correct
Explanation: Bird populations indicate ecosystem Health. Their decline in India is due to habitat loss from urbanization and deforestation, hunting pressures, and exposure to chemical fertilizers, pesticides, and mosquito repellents. These factors affect Food sources, reproduction, and survival. Organic farming reduces chemical use but cannot fully offset habitat destruction. Collectively, these pressures reduce bird populations despite rising human numbers.
For example, similar to how bee populations collapse under pesticide exposure, birds also fail to thrive when natural habitats and Food are disrupted.
Overall, human activity and chemical usage are major drivers of avian decline in India.
Option c – III and IV are correct
While travelling through the Himalayan region, which plants are most commonly found growing naturally?. I. Oak II. Rhododendron III. Sandalwood
a) I and II
b) Only III
c) I and III
d) All of these
Explanation: The Himalayas exhibit altitudinal zonation, influencing plant distribution. Oak and rhododendron dominate mid to high altitudes, adapted to cool, moist, and temperate climates. Sandalwood, a tropical plant, prefers warm lowlands and rarely occurs naturally at higher altitudes. Climatic conditions, soil, and rainfall determine which species can survive.
This is similar to how pine trees dominate cold European mountains while olive trees prefer Mediterranean climates. Altitude and Environment shape Himalayan flora distribution.
Overall, plant growth in the Himalayas depends on ecological suitability, favoring oak and rhododendron at higher elevations.
Option a – I and II
Coral reefs are found in which of the following areas?. I. Andaman and Nicobar Islands II. Gulf of Kachchh III. Gulf of Mannar IV. Sunderbans
a) I, II, and III only
b) II and IV only
c) I and III only
d) I, II, III, and IV
Explanation: Coral reefs require shallow, warm, sunlit waters, and are sensitive to salinity and temperature. India’s Andaman & Nicobar Islands, Gulf of Kachchh, and Gulf of Mannar provide ideal conditions for coral growth. Sunderbans, being a mangrove-dominated delta with fluctuating salinity, is unsuitable. Reefs support Biodiversity and act as natural coastal buffers, providing habitats for numerous marine species.
For instance, coral reefs in Andaman islands host colorful fish and invertebrates similar to tropical reefs worldwide.
Overall, coral distribution is determined by sunlight, water clarity, and stable salinity.
Option a – I, II, and III only
Assertion: The south-western island regions of India possess rich Biodiversity. Reason: These islands receive heavy rainfall and are surrounded by oceanic waters.
a) Both A and R are true and R explains A correctly
b) Both A and R are true, but R is not the correct explanation
c) A is true, but R is false
d) A is false, but R is true
Explanation: The south-western islands, such as the Andaman & Nicobar group, have high rainfall, consistent humidity, and oceanic influences. These conditions create diverse habitats, including mangroves, evergreen forests, and coral reefs. Such ecological richness supports numerous endemic species. The Climate and isolation of these islands contribute to high Biodiversity compared to mainland regions.
Like Madagascar’s isolated ecosystems, these islands’ separation encourages unique species development.
Overall, rainfall, humidity, and geographic isolation make these islands Biodiversity hotspots.
Option a – Both A and R are true and R explains A correctly
Which factor is not a cause of Biodiversity loss in Uttarakhand?
a) Expansion of road infrastructure
b) Rapid urban growth
c) Planting trees on degraded land
d) Agricultural land expansion
Explanation: Biodiversity in Uttarakhand is affected by urban growth, road expansion, and agricultural encroachment. However, planting trees on degraded land is a restorative measure rather than a threat. Such afforestation improves habitat connectivity, stabilizes soil, and provides resources for Wildlife. Therefore, reforestation is a conservation effort, not a driver of Biodiversity loss.
Analogous to rewilding in European landscapes, afforestation enhances biodiversity rather than diminishing it.
Overall, human expansion and habitat destruction cause loss, whereas planting trees helps biodiversity.
Option c – Planting trees on degraded land
Which of the following is a serious threat to biodiversity?
a) Fragile environments like mangroves and wetlands
b) Inaccessible zones in the Himalayas
c) Clearing forests and shifting Agriculture practices
d) Establishment of biosphere reserves
Explanation: Biodiversity is threatened by habitat destruction, overexploitation, and unsustainable practices. Clearing forests and shifting Agriculture remove native vegetation, fragment ecosystems, and reduce species survival chances. Fragile environments like mangroves are particularly vulnerable. Protected areas, conversely, help conserve ecosystems and do not constitute threats.
For example, slash-and-burn Agriculture in tropical forests disrupts species diversity and ecosystem balance.
Overall, habitat destruction and unsustainable practices pose the greatest threats to biodiversity.
Option c – Clearing forests and shifting Agriculture practices
Which region in India is recognised as a biodiversity hotspot?
a) Andaman and Nicobar Islands
b) Ganga Plains
c) Central India
d) None of the above
Explanation: Biodiversity hotspots are regions with high species richness and endemism under significant threat. India hosts multiple hotspots, such as the Western Ghats, Eastern Himalayas, and Andaman & Nicobar Islands. These areas harbor unique flora and fauna due to diverse climates, altitudinal variation, and geographic isolation, making them conservation priorities.
Like the Amazon rainforest globally, these Indian regions concentrate large numbers of species in limited areas.
Overall, hotspots are ecologically rich zones requiring focused conservation.
Option a – Andaman and Nicobar Islands
Which national park experiences a Climate range from tropical to arctic?
a) Khangchendzonga National Park
b) Nandadevi National Park
c) Neora Valley National Park
d) Namdapha National Park
Explanation: Khangchendzonga National Park spans altitudes from low subtropical forests to high alpine zones. This elevational gradient produces climatic variation from warm tropical valleys to icy, arctic-like peaks. Such diversity supports a wide range of species adapted to different temperatures and vegetation types, making it ecologically significant.
Similar to Mount Kilimanjaro, where multiple Climate zones exist along elevation, this park shows climatic stratification.
Overall, altitude variation in Khangchendzonga creates multiple climatic zones supporting diverse ecosystems.
Option d – Namdapha National Park
Which region in India is known for hosting mangrove, evergreen, and deciduous forests together?
a) Northern Andhra Pradesh Coast
b) Southwestern Bengal
c) Southern Saurashtra
d) Andaman and Nicobar Islands
Explanation: The Andaman and Nicobar Islands support mangroves along the coast, evergreen forests inland, and patches of deciduous vegetation in transitional zones. This overlap of Forest types results from varied rainfall, soil types, and topography. Such diversity allows numerous plant and Animal species to coexist in a compact area.
Analogous to Southeast Asian islands, multiple Forest types on islands create ecological richness.
Overall, diverse habitats in the Andaman & Nicobar Islands sustain high biodiversity.
Option d – Andaman and Nicobar Islands
Consider the following statements: I. Biodiversity hotspots are located only in tropical zones. II. India’s four hotspots are the Eastern Himalayas, Western Himalayas, Western Ghats, and the Andaman and Nicobar Islands.
a) Only I
b) Only II
c) Both I and II
d) Neither I nor II
Explanation: Biodiversity hotspots often occur in tropical and subtropical regions due to favorable temperature, rainfall, and stable ecosystems. India’s hotspots include mountainous and island regions, supporting endemic species. While most are tropical, the Western Himalayas extend into temperate zones. Hotspot designation considers species richness, endemism, and threat levels rather than strict latitude.
Similar to tropical Andes, diverse climatic and geographic conditions, not only latitude, define hotspots.
Overall, hotspots combine high species richness and ecological vulnerability rather than being confined strictly to the tropics.
Option d – Neither I nor II
Three of the following criteria have been used to designate biodiversity hotspots like the Western Ghats, Sri Lanka, and Indo-Burma: I. Species diversity II. Vegetation density III. Endemism IV. Cultural plant use V. Threat levels VI. Adaptation to hot, arid climates
a) I, II and VI
b) II, IV and VI
c) I, III and V
d) II, IV and VI
Explanation: Biodiversity hotspots are identified based on species richness, high endemism (species found nowhere else), and significant threat levels due to habitat loss or human activity. Vegetation density and cultural uses may support biodiversity but are secondary. Adaptation to arid climates is less relevant in humid, tropical hotspots. These criteria help prioritize regions for conservation where unique species are at risk.
For example, the Western Ghats and Sri Lanka harbor many endemic amphibians and plants under threat from deforestation and urbanization.
Overall, hotspots are designated by species diversity, endemism, and threat level, ensuring effective conservation focus.
Option c – I, III and V
Identify the biodiversity hotspots from the list below: I. Eastern Himalayas II. Eastern Mediterranean III. Northwestern Australia
a) Only I
b) I and II
c) II and III
d) I, II, and III
Explanation: The Eastern Himalayas are recognized as a global biodiversity hotspot due to high species richness and endemism. The Eastern Mediterranean and Northwestern Australia are important regions globally but are not classified as Indian biodiversity hotspots. Hotspot recognition considers both biodiversity value and conservation urgency.
Similar to how the Amazon is globally significant but specific regions are designated as hotspots, India’s hotspots are chosen based on ecological uniqueness.
Overall, only the Eastern Himalayas qualifies as an Indian biodiversity hotspot.
Option a – Only I
A species is considered extinct when it has not been observed in the wild for how many years?
a) 15 years
b) 25 years
c) 40 years
d) 50 years
Explanation: Species extinction is determined by absence in natural habitats over extended periods, despite targeted surveys. Typically, decades of no sightings indicate true extinction. The duration ensures that temporary absence or Population fluctuation is not mistaken for extinction. Conservation assessments like the IUCN Red List use this criterion to classify species’ risk levels.
For example, the passenger pigeon was declared extinct after decades of unsuccessful sightings despite its historical abundance.
Overall, long-term absence in the wild is the key criterion for declaring species extinct.
Option d – 50 years
What is the main reason for the declining Population of vultures in India?
Explanation: Vultures in India have declined mainly due to veterinary use of the drug diclofenac in livestock. When vultures feed on treated carcasses, they suffer kidney failure and die. This is an example of chemical bioaccumulation affecting top scavengers. Habitat loss and human disturbance also play minor roles, but diclofenac toxicity is the primary cause of rapid Population decline.
Analogous to how pesticide use affected predatory birds like eagles in the West, drugs can indirectly decimate scavenger populations.
Overall, veterinary diclofenac use is the main factor behind vulture Population collapse in India.
Option a – Overuse of Diclofenac
Which of the following is least responsible for species extinction?
a) Wide ecological range
b) Large body size
c) Limited ecological range
d) Genetic uniformity
Explanation: Species extinction is driven by habitat loss, limited ecological range, and genetic uniformity. A wide ecological range allows species to adapt to diverse conditions, making them less vulnerable to extinction. Larger body size may increase vulnerability in some cases but is less consistent than habitat specificity. Therefore, species with broad ecological tolerance are generally resilient.
Similar to how raccoons thrive in diverse environments, species with wide ecological ranges survive environmental changes better than specialists.
Overall, broad ecological range reduces the risk of extinction.
Option d – Genetic uniformity
Where is the Silent Valley located?
a) Uttarakhand
b) Kerala
c) Arunachal Pradesh
d) Jammu and Kashmir
Explanation: The Silent Valley is a tropical evergreen Forest in India, noted for its undisturbed biodiversity. Its location in a specific state provides the right rainfall, temperature, and topography to support endemic species. The area has been preserved to protect rare flora and fauna, serving as a classic example of successful in-situ conservation.
Similar to protected reserves globally, maintaining habitat integrity ensures species survival.
Overall, Silent Valley represents a key biodiversity area with intact tropical forests.
Option b – Kerala
Which state is associated with the Silent Valley project?
a) Uttarakhand
b) Himachal Pradesh
c) Kerala
d) Tamil Nadu
Explanation: The Silent Valley project was established to conserve the region’s unique tropical Forest ecosystem. Conservation efforts focus on protecting endemic species, preventing deforestation, and maintaining ecological balance. The state government collaborated with scientists and environmentalists to legally protect the area as a national park, demonstrating state-level conservation action.
Like conservation initiatives in Amazon reserves, protecting critical habitats preserves biodiversity.
Overall, the Silent Valley project ensures the survival of rare species through legal protection and habitat preservation.
Option c – Kerala
The Valley of Flowers is located in which Indian state?
a) Kerala
b) Jammu and Kashmir
c) Uttarakhand
d) Himachal Pradesh
Explanation: The Valley of Flowers lies in a high-altitude Himalayan region. Its sub-alpine and alpine meadows experience heavy rainfall and short summers, supporting endemic flowering plants. The area’s elevation, Climate, and soil create optimal conditions for a rich assemblage of flora, making it ecologically unique and recognized internationally.
Similar to alpine meadows in Europe, seasonal blooms attract diverse pollinators and tourists.
Overall, elevation and Climate in the Himalayas allow the Valley of Flowers to host remarkable plant diversity.
Option c – Uttarakhand
Which area in India contains the richest biodiversity?
a) Indo-Gangetic Plains
b) Trans-Himalayas
c) Western Ghats
d) Central India
Explanation: The Western Ghats are among India’s most biodiverse regions due to tropical Climate, varied topography, and isolation. They support high endemism in plants, amphibians, reptiles, and insects. Rich rainfall and continuous Forest cover create multiple habitats, fostering ecological complexity and species richness.
Like the Amazon basin globally, compact regions with high rainfall and vegetation harbor exceptional biodiversity.
Overall, Western Ghats provide the richest concentration of species in India.
Option c – Western Ghats
Which of the following is a biodiversity-rich zone in India?
a) Eastern Ghats
b) Western Ghats
c) Thar Desert
d) Bay of Bengal
Explanation: Biodiversity-rich zones are areas with high species richness and endemism. The Western Ghats, Eastern Himalayas, and Andaman & Nicobar Islands exemplify this in India. Factors such as rainfall, altitude, soil type, and geographic isolation enhance habitat diversity, supporting unique species. Arid regions like deserts have fewer species and lower richness.
Similar to hotspots like Madagascar, India’s biodiversity zones combine high species density with ecological uniqueness.
Overall, biodiversity-rich zones are determined by species richness, endemism, and habitat diversity.
Option b – Western Ghats
Which regions are identified as biodiversity hotspots in India?
a) Western Himalayas and Eastern Ghats
b) Western Himalayas and Sunderbans
c) Eastern Himalayas and Western Ghats
d) Eastern Himalayas and Silent Valley
Explanation: Biodiversity hotspots in India are areas with exceptional species richness and high endemism under threat. The Eastern Himalayas and Western Ghats are prime examples. Factors such as diverse Climate, altitude, and geographic isolation create unique habitats supporting many endemic plants and animals. These regions are prioritized for conservation due to ecological importance.
Similar to hotspots like the Amazon basin, Indian hotspots combine biodiversity density with vulnerability.
Overall, the Eastern Himalayas and Western Ghats are key biodiversity hotspots in India.
Option c – Eastern Himalayas and Western Ghats
Which of the following is not a biodiversity hotspot in India?
a) Himalayas
b) Vindhyas
c) North-East India
d) Western Ghats
Explanation: Biodiversity hotspots are regions with high species richness and significant threat levels. While the Himalayas, North-East India, and Western Ghats are recognized hotspots, the Vindhyas do not meet the criteria for high endemism or richness. Conservation focus is given to areas with unique species under threat, whereas less diverse regions like the Vindhyas are not included.
For example, deserts or semi-arid regions generally support fewer endemic species than tropical forests.
Overall, the Vindhyas are not classified as a biodiversity hotspot in India.
Option b – Vindhyas
Why is the Himalayan region rich in species diversity?
a) Heavy rainfall supports lush vegetation
b) It connects several biogeographic zones
c) It lacks invasive species
d) Minimal human disruption
Explanation: The Himalayas connect multiple biogeographic zones, creating overlapping habitats that support diverse flora and fauna. Heavy rainfall and altitudinal gradients produce varied microclimates and vegetation types, increasing species richness. Limited human disturbance in remote areas further supports biodiversity.
Similar to mountainous regions worldwide, such as the Andes, habitat complexity enhances species diversity.
Overall, biogeographic convergence, rainfall, and altitude make the Himalayas ecologically rich.
Option b – It connects several biogeographic zones
Where is India’s most biodiverse region?
a) Silent Valley
b) Kashmir Valley
c) Valley of Flowers
d) Surma Valley
Explanation: India’s most biodiverse region combines tropical forests, high rainfall, and varied terrain. Regions like the Western Ghats and select Himalayan areas host many endemic species of plants, amphibians, and insects. Habitat heterogeneity and Climate stability contribute to exceptional species richness.
Comparable to the Amazon in South America, concentrated biodiversity occurs in areas with ecological complexity and minimal disturbance.
Overall, Western Ghats and certain Himalayan zones are India’s most biodiverse regions.
Option a – Silent Valley
What happens to total energy as one moves up a Food chain?
a) It increases
b) It is conserved
c) It is lost
d) None of the above
Explanation: energy transfer in a Food chain is inefficient, with losses at each trophic level due to metabolism, Heat, and Respiration. As energy moves from producers to herbivores and carnivores, less is available to higher trophic levels. This results in declining energy availability at top predators and constrains Population sizes.
Similar to how a pyramid narrows from bottom to top, energy diminishes as it moves through trophic levels.
Overall, total energy decreases along a Food chain due to energy loss at each step.
Option d – None of the above
In an ecological pyramid, energy is greatest at the ……… level and least at the ……… level.
a) Producers, consumers
b) Consumers, decomposers
c) Top, bottom
d) Bottom, top
Explanation: In energy pyramids, producers capture Solarenergy through photosynthesis, forming the Base. Herbivores, carnivores, and top predators occupy higher levels and receive only a fraction (~10%) of the previous level’s energy. Energy diminishes upward due to consumption inefficiencies and Heat loss.
For example, if producers store 10,000 J, only a small fraction reaches tertiary consumers.
Overall, energy is maximal at producers and minimal at top consumers.
Explanation: Population size in a Food chain decreases from producers to top predators. Producers form the Base with the largest numbers, supporting herbivores, secondary consumers, and tertiary consumers. This pattern occurs because energy transfer is inefficient, limiting Population size at higher levels.
Analogous to a pyramid, where the Base is broad and top is narrow, populations shrink upward.
Overall, producers have the highest Population in a Food chain due to energy availability.
Which statements about biomass in Food pyramids are true?
a) It is upright in land ecosystems
b) Each level contains 10% of the previous one
c) Biomass decreases at higher levels
d) All of the above
Explanation: Biomass pyramids represent the total Mass of Living Organisms at each trophic level. Land ecosystems typically show upright pyramids, where producers’ biomass is greatest. Energy transfer inefficiency results in reduced biomass at higher levels. Each level often contains roughly 10% of the energy or biomass of the preceding level, reflecting ecological constraints.
Like stacked blocks, each higher trophic level supports fewer Organisms and biomass.
Overall, biomass decreases at higher trophic levels in a Food pyramid.
Option d – All of the above
Which factor is not essential for ecosystem stability?
Explanation: Ecosystem stability depends on Matter cycling, energy flow, and interactions among food chains/webs. Changes in atmospheric conditions (like temporary weather fluctuations) are not core determinants of ecosystem stability, although extreme changes can impact ecosystems. Essential factors maintain nutrient availability, trophic balance, and energy transfer.
Similar to how a machine requires energy input and material cycling to function, ecosystems need nutrient and energy stability.
Overall, cycling of Matter, energy flow, and food web interactions are essential, while atmospheric changes are secondary.
What happens if top predators are removed from a food chain?
a) Energy flow is interrupted
b) Secondary consumers multiply
c) Both (a) and (b)
d) None of the above
Explanation: Top predators regulate populations of secondary consumers and herbivores. Removing them leads to overpopulation of lower trophic levels, disrupting energy flow and causing cascading ecological effects. This imbalance may reduce plant biomass, alter species composition, and destabilize the ecosystem.
For example, the removal of wolves in Yellowstone caused elk overpopulation, affecting vegetation and other species.
Overall, top predators are critical for maintaining ecosystem balance and energy flow.
Option c – Both (a) and (b)
In aquatic ecosystems, which of the following is a primary producer?
a) Duckweed
b) Ducks
c) Fish
d) Insects
Explanation: Primary producers synthesize their own food using sunlight through photosynthesis. In aquatic systems, plants like duckweed, algae, and phytoplankton serve this role. Animals such as fish, ducks, and insects are consumers that rely on producers for energy. Primary producers form the Base of the food chain and support higher trophic levels.
Overall, primary producers are autotrophs like duckweed in aquatic ecosystems.
Option a – Duckweed
Regarding food chains in ecosystems, consider these points: 1. They represent how Organisms consume one another in a specific order. 2. They exist only within populations of the same species. 3. They show the quantity of Organisms consumed at each level.
a) Only 1
b) 1 and 2 only
c) 1, 2, and 3
d) None
Explanation: Food chains depict energy flow through ecosystems, illustrating predator-prey relationships in a sequential order. They connect multiple species across trophic levels, not just within a single species. While they imply consumption rates, exact quantities vary and are often represented in energy or biomass pyramids rather than simple food chains.
Similar to a supply chain where products pass from raw materials to final consumers, energy flows sequentially from producers to top predators.
Overall, food chains show energy flow through multiple species in a specific order.
Option a – Only 1
What might happen if the balance between living and non-living components of an ecosystem is severely disrupted?
Explanation: Ecosystem stability relies on interactions between biotic (living) and abiotic (non-living) components. Disruption—such as Pollution, deforestation, or Climate change—can destabilize nutrient cycling, water balance, and energy flow. Severe imbalances may threaten species survival, reduce biodiversity, and impair ecosystem services essential for human and environmental Health.
For example, removing wetlands can increase flooding, alter species composition, and affect water purification.
Overall, severe disruptions in ecosystem balance can threaten life and ecological functions.
How are Oryx and Chiru antelopes different from each other?
a) Oryx thrives in hot deserts, while Chiru survives in cold, mountainous semi-arid regions
b) Oryx is hunted for antlers, Chiru for musk
c) Oryx is native to western India; Chiru to northeast India
d) None of the above
Explanation: Oryx and Chiru occupy distinct habitats and climates. Oryx thrives in hot deserts, adapted to high temperatures and arid conditions. Chiru inhabits cold, mountainous semi-arid regions like the Tibetan plateau, adapted to low temperatures and sparse vegetation. Differences in physiology and behavior reflect their adaptation to contrasting environments, illustrating ecological specialization.
Like camels in deserts versus snow leopards in mountains, species evolve traits suited to their specific habitats.
Overall, Oryx and Chiru differ in habitat and climatic adaptation.
Option a – Oryx thrives in hot deserts, while Chiru survives in cold, mountainous semi-arid regions
In which type of protected area in India are people strictly prohibited from using biomass resources?
Explanation: National Parks are the most restrictive type of protected area in India. Biomass collection, grazing, and resource extraction are prohibited to conserve biodiversity. Biosphere Reserves allow limited use in buffer zones, and Wildlife Sanctuaries may permit regulated activity. Strict protection ensures preservation of species, habitats, and ecological integrity.
Similar to strict nature reserves globally, limiting human interference preserves sensitive ecosystems.
Overall, National Parks prevent human exploitation of biomass to protect biodiversity.
Option b – National Parks
If birds found in high altitudes go extinct, which plant species might also disappear?
a) Pine
b) Oak
c) Orchids
d) Rhododendrons
Explanation: Certain high-altitude plants depend on birds for pollination and seed dispersal. Extinction of bird species disrupts these mutualistic relationships, preventing reproduction and spread of plants like orchids and rhododendrons. Loss of pollinators can reduce plant diversity and affect entire alpine ecosystems.
Like honeybees affecting fruit crops, high-altitude birds are essential for plant survival.
Overall, the extinction of bird species can threaten dependent plant species.
Option d – Rhododendrons
In an ecosystem, the 10% energy transfer between trophic levels occurs in which form?
Explanation: Energy transfer between trophic levels primarily occurs as chemical energy stored in food. Approximately 10% of energy at one level is available to the next; the rest is lost as Heat during metabolism, movement, and growth. This 10% rule underlies ecological pyramids and limits the number of trophic levels.
Analogous to passing coins through a series of hands while losing some at each step, energy diminishes along the chain.
Overall, energy transfer occurs as chemical energy, with substantial losses as Heat.
Option c – Chemical energy
Given a food chain: Producers → Herbivores → Small carnivores → Top carnivores. If producers have 10,000 J energy, how much reaches the top carnivores?
a) 1,000 J
b) 100 J
c) 10 J
d) 1 J
Explanation: Energy transfer efficiency is ~10% per trophic level. From producers (10,000 J), herbivores receive 1,000 J, small carnivores 100 J, and top carnivores only 10 J. Energy diminishes at each level due to metabolism, Heat loss, and inefficiencies, explaining why top predators have smaller populations.
Like a pyramid where each higher tier holds less weight, energy decreases up trophic levels.
Overall, only a fraction of energy reaches top carnivores in a food chain.
Option c – 10 J
What percentage of Solar energy do green plants typically capture for photosynthesis?
a) 1%
b) 5%
c) 8%
d) 10%
Explanation: Green plants capture a small fraction of Solar energy, typically about 1%, for photosynthesis. The rest is reflected, transmitted, or lost as Heat. Despite low efficiency, this energy supports all food chains by producing chemical energy stored in biomass, which is transferred to herbivores and higher trophic levels.
Similar to Solar panels converting only a fraction of sunlight into Electricity, plants convert a small portion into chemical energy.
Overall, plants capture a minimal (~1%) percentage of Solar energy for photosynthesis.
Option a – 1%
When a frog eats a grasshopper, how is energy transferred?
a) From producer to decomposer
b) From producer to primary consumer
c) From primary consumer to secondary consumer
d) From secondary consumer to primary consumer
Explanation: Energy moves from lower to higher trophic levels. Grasshoppers, as primary consumers, obtain energy from plants (producers). When a frog (secondary consumer) eats a grasshopper, energy stored as chemical energy in the grasshopper’s biomass is transferred to the frog. Some energy is lost as Heat during metabolism.
Analogous to humans eating herbivores, energy flows upward through consumption.
Overall, energy transfers from primary to secondary consumers through feeding interactions.
Option c – From primary consumer to secondary consumer
Who introduced the term “ecosystem”?
a) Tansley
b) Odum
c) Warming
d) Darwin
Explanation: The term “ecosystem” was introduced by Arthur Tansley to describe the functional unit of nature where Organisms interact with each other and their physical Environment. It emphasizes the interdependence of biotic and abiotic components and the flow of energy and Matter. The concept laid the foundation for modern Ecology and ecosystem management.
Similar to a factory where machinery and workers interact to produce goods, ecosystems function through interactions among Living Organisms and environmental factors.
Overall, Tansley coined “ecosystem” to define integrated ecological units.
Option a – Tansley
When Organisms at higher trophic levels consume various Organisms from lower levels, they form a
a) Food web
b) Ecological pyramid
c) Ecosystem
d) Food chain
Explanation: A food web illustrates complex feeding relationships among Organisms across multiple trophic levels. Unlike a simple linear food chain, it shows that higher-level consumers feed on several species from lower levels, creating interlinked energy pathways. Food webs demonstrate ecosystem complexity and stability.
Similar to a transportation Network where multiple routes connect different locations, species interactions form interconnected feeding links.
Overall, higher trophic consumption of multiple species forms a food web.
Option a – Food web
What does the “Greendex” score assess, as published by National Geographic and GlobeScan?
Explanation: The Greendex score measures sustainable consumption behavior of citizens in different countries. It evaluates lifestyle choices, energy use, resource consumption, and ecological footprint. Higher scores indicate more environmentally responsible practices, while lower scores show higher environmental impact. It helps identify areas for promoting sustainability.
Similar to a credit score reflecting financial behavior, the Greendex quantifies environmental behavior at the individual or national level.
Overall, Greendex assesses sustainable consumption and ecological impact of citizens.
Option b – Sustainable consumption behavior of citizens
Under the Ramsar Convention, how should India manage its designated wetland sites?
a) Completely restrict human access
b) Allow tourism only under ecosystem guidelines
c) Preserve them for a period before allowing limited use
d) Maintain them through sustainable ecosystem management
Explanation: The Ramsar Convention emphasizes sustainable management of wetlands. India must maintain wetland ecosystems through regulated use, preserving ecological functions while allowing limited tourism or resource use following guidelines. Wetlands support biodiversity, water purification, flood control, and livelihoods, so sustainable practices ensure long-term conservation.
Like protected zones in national parks, human activities in Ramsar wetlands are carefully managed to prevent ecological degradation.
Overall, India should manage Ramsar wetlands using sustainable ecosystem practices.
Option d – Maintain them through sustainable ecosystem management
In a coastal area where three rivers converge and flow into the Bay of Bengal near a biodiversity hotspot, which location is most likely described?
a) Bhitarkanika
b) Chandipur-on-sea
c) Gopalpur-on-sea
d) Simlipal
Explanation: The description fits Bhitarkanika, a mangrove-rich region at river mouths in Odisha. Confluence of rivers and estuarine habitats supports high species richness, including birds, reptiles, and aquatic life. Mangroves act as natural buffers and nurseries for fish, enhancing biodiversity.
Similar to the Sundarbans in West Bengal, estuarine ecosystems support diverse species due to nutrient-rich waters and varied habitats.
Overall, river confluences with mangroves create biodiversity hotspots like Bhitarkanika.
Option a – Bhitarkanika
Which three factors have led to the designation of the Western Ghats, Sri Lanka, and Indo-Burma as biodiversity hotspots?
a) Species diversity, vegetation density, and humid adaptation
b) Vegetation density, cultural significance, and humid adaptation
c) Species diversity, endemism, and threat level
d) Endemism, cultural significance, and humid adaptation
Explanation: Biodiversity hotspots are designated based on species diversity, high endemism, and significant threat levels. The Western Ghats, Sri Lanka, and Indo-Burma contain unique species that are geographically restricted and face habitat loss or human pressures. Conservation prioritization is based on these three criteria to protect ecological value effectively.
Similar to global hotspots like Madagascar, selection depends on uniqueness, richness, and vulnerability of species.
Overall, species diversity, endemism, and threat levels justify hotspot designation.
Option c – Species diversity, endemism, and threat level
Consider these statements about protected areas: 1. National Park boundaries are legally defined. 2. Biosphere Reserves conserve specific plant and Animal species. 3. Wildlife Sanctuaries allow limited human activity.
a) Only 1
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2, and 3
Explanation: Protected areas in India vary in regulation. National Parks are strictly protected with legal boundaries, prohibiting human exploitation. Biosphere Reserves conserve biodiversity and allow research and limited sustainable use in buffer zones. Wildlife Sanctuaries permit regulated human activity like grazing or collection of minor Forest produce.
Similar to zoning in urban planning, different protection levels balance conservation and human needs.
Overall, each type of protected area has specific legal and functional roles.
Option c – 1 and 3 only
In a food chain involving a crop, rat, snake, and hawk, which organism accumulates the most pesticide?
a) Crop
b) Rat
c) Snake
d) Hawk
Explanation: Top predators like hawks accumulate the highest pesticide levels through biomagnification. Chemicals like DDT concentrate at each trophic level, increasing in concentration from prey to predator. Crops may contain initial residues, but as rats, snakes, and hawks consume contaminated Organisms, the chemical magnifies in higher trophic levels.
Similar to how mercury accumulates in larger fish, toxins magnify in apex consumers.
Overall, top predators face maximum chemical accumulation due to biomagnification.
Option d – Hawk
Choose the correct statements: 1. Biodiversity tends to be higher in lower latitudes than in higher latitudes. 2. On mountains, diversity is richer at lower altitudes than at higher ones.
a) Only 1
b) Only 2
c) Both 1 and 2
d) Neither 1 nor 2
Explanation: Species richness is generally higher near the equator due to stable climates, high productivity, and diverse habitats. On mountains, lower altitudes have more favorable temperatures, soil, and vegetation, supporting greater diversity than harsh, colder high-altitude zones. Both global latitude and local altitude influence species richness.
Analogous to tropical forests vs polar tundra, favorable conditions support higher biodiversity.
Overall, biodiversity is higher in lower latitudes and lower mountain altitudes.
Option c – Both 1 and 2
How does the National Biodiversity Authority (NBA) support Indian Agriculture?. 1. Prevents biopiracy and protects local genetic material. 2. Oversees GM crop research. 3. Requires NBA approval for intellectual property claims on biological resources.
a) Only 1
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2, and 3
Explanation: The NBA regulates use of India’s biological resources, ensuring farmers’ and indigenous communities’ rights are protected. It prevents biopiracy, oversees intellectual property rights, and regulates access to genetic material. This protects biodiversity and promotes sustainable agricultural practices. Oversight of GM crops ensures biosafety and ethical compliance.
Similar to patent offices protecting inventions, NBA safeguards biological resources for conservation and fair use.
Overall, NBA supports Agriculture through biopiracy prevention, IP regulation, and sustainable resource management.
Option c – 1 and 3 only
What does the IUCN Red Data Book list?. 1. Endemic species in biodiversity zones. 2. Species facing extinction risks. 3. Protected areas globally.
a) 1 and 3
b) 2 only
c) 2 and 3
d) 3 only
Explanation: The IUCN Red Data Book catalogs species at risk of extinction. It identifies threatened, endangered, and vulnerable species globally, providing data on population status, threats, and conservation needs. This resource guides policymakers, conservationists, and researchers in prioritizing protection measures for biodiversity.
Similar to a medical triage system, it highlights species requiring urgent conservation action.
Overall, the Red Data Book lists species facing extinction risks worldwide.
Option b – 2 only
Which is not an example of in-situ conservation of plant species?
Explanation: In-situ conservation protects plants in their natural habitats, such as National Parks, Wildlife Sanctuaries, and Biosphere Reserves. Botanical Gardens, however, are ex-situ, where plants are grown outside their natural Environment for research, education, or restoration purposes. In-situ strategies maintain ecological interactions and natural evolutionary processes.
Like keeping animals in the wild versus captivity, natural habitats preserve ecological dynamics.
Overall, botanical gardens are not in-situ conservation sites.
Option b – Botanical Garden
How do mangrove forests help during natural disasters like tsunamis?
a) They create a buffer between sea and settlements
b) They offer emergency food and medicine
c) Their canopy provides shelter
d) Their strong roots resist being uprooted
Explanation: Mangroves act as natural barriers, reducing the speed and impact of waves during tsunamis and cyclones. Their dense root networks stabilize shorelines, prevent erosion, and protect coastal settlements. Additionally, they provide shelter and resources for Wildlife, contributing to ecosystem resilience.
Similar to a breakwater or buffer zone, mangroves dissipate energy and minimize damage.
Overall, mangroves protect coastal regions and ecosystems during natural disasters.
Option d – Their strong roots resist being uprooted
What makes the Himalayas highly diverse in species?
a) Heavy rainfall encourages plant growth
b) It lies at the junction of many biogeographic zones
c) Few foreign species have been introduced
d) Human activity is minimal
Explanation: The Himalayas’ biodiversity is enhanced by climatic variation, altitudinal gradients, and intersection of multiple biogeographic zones. These factors create varied habitats and microclimates supporting numerous endemic plants and animals. Minimal human intrusion in remote areas also preserves ecological integrity.
Comparable to other mountain ranges, altitude and habitat heterogeneity promote species diversity.
Overall, geographic and climatic complexity makes the Himalayas rich in species.
Option b – It lies at the junction of many biogeographic zones
Which Indian Animal is threatened mainly due to habitat destruction, even though it faces no natural predators?
a) Wild buffalo
b) Wild ass
c) Wild boar
d) Gazelle
Explanation: Some herbivores, like the wild ass, are primarily threatened by habitat loss from Agriculture, urbanization, and grazing. Predation is not a major factor; human activities fragment habitats, reduce food availability, and increase mortality. Conservation focuses on habitat protection and restoration.
Like many island species, loss of habitat rather than predation is the main threat.
Overall, wild ass populations decline mainly due to habitat destruction.
Option b – Wild ass
Biodiversity supports human survival through which of the following?. 1. Formation of soil 2. Preventing erosion 3. Recycling waste 4. Crop pollination
a) 1, 2, and 3 only
b) 2, 3, and 4 only
c) 1 and 4 only
d) 1, 2, 3, and 4
Explanation: Biodiversity maintains ecosystem functions essential for human survival. Soil formation, erosion prevention, nutrient recycling, and pollination sustain Agriculture and ecological balance. Plants, microbes, and animals interact to maintain these services. Loss of biodiversity disrupts ecosystem processes, affecting food security and environmental stability.
Analogous to a balanced supply chain supporting human society, ecosystems rely on species interactions.
Overall, biodiversity underpins essential ecological services for human survival.
Option d – 1, 2, 3, and 4
What can happen due to long-term exposure to UV radiation?
a) Immune and respiratory damage
b) Respiratory and digestive damage
c) Immune suppression and skin cancer
d) Skin cancer and digestive ulcers
Explanation: Prolonged UV exposure damages DNA, suppresses the immune system, and can cause skin cancer. UV radiation may also affect eyes and indirectly impair other tissues. Protective mechanisms like melanin and sunscreen mitigate risks, but long-term exposure remains harmful to humans and animals.
Similar to prolonged exposure to harmful chemicals, UV radiation accumulates damage over time.
Overall, long-term UV exposure can cause immune suppression and skin cancer.
Option c – Immune suppression and skin cancer
Certain species influence the survival of many others in their habitat. What are they called?
a) Keystone species
b) Allopatric species
c) Sympatric species
d) Threatened species
Explanation: Keystone species have a disproportionately large impact on ecosystem structure relative to their abundance. Their presence or absence affects multiple species, trophic interactions, and habitat stability. Examples include apex predators and certain pollinators. Protecting keystone species maintains overall ecosystem Health.
Like a cornerstone in a building, their removal can collapse ecological balance.
Overall, species critical to ecosystem stability are called keystone species.
Option a – Keystone species
Which of these Indian animals is endangered?. 1. Crocodile 2. Elephant
a) Only 1
b) Only 2
c) Both 1 and 2
d) Neither 1 nor 2
Explanation: Both saltwater crocodiles and elephants face threats from habitat loss, poaching, and human-Wildlife conflict. Conservation programs, legal protection, and habitat management aim to reduce these risks. Endangered status indicates significant decline and high risk of extinction if threats continue.
Similar to endangered species globally, population monitoring and protection are essential.
Overall, both crocodiles and elephants are considered endangered in India.
Option a – Only 1
Which is true about Indian Wildlife species?. 1. Saltwater crocodiles live in the Andaman & Nicobar Islands. 2. Shrew and tapir are found in the Malabar region.
a) Only 1
b) Only 2
c) Both 1 and 2
d) Neither 1 nor 2
Explanation: Saltwater crocodiles inhabit coastal mangroves, estuaries, and islands like Andaman & Nicobar. Malabar, in Kerala, is home to shrews and the Malayan tapir. Understanding species distribution is crucial for conservation planning and habitat protection. Misidentifying ranges can misguide management efforts.
Like mapping human populations, species distributions guide conservation priorities.
Overall, both statements about Indian wildlife distributions are correct.
Option a – Only 1
Which statements about biodiversity hotspots in India are incorrect?. 1. They exist only in the tropics. 2. India has four hotspots, including the Western Himalayas.
a) Only 1
b) Only 2
c) Both 1 and 2
d) Neither 1 nor 2
Explanation: Biodiversity hotspots are regions with high species richness, endemism, and significant threats. While many are tropical, some, like the Himalayas, extend into temperate zones. India has four recognized hotspots: the Himalayas, Indo-Burma, Western Ghats, and Sundalands (Andaman & Nicobar). Misconceptions often arise regarding their strict tropical presence.
Analogous to ecological zones worldwide, hotspots span different climates based on species uniqueness and threat levels.
Overall, hotspots are not limited to tropics; India has four diverse biodiversity hotspots.
Option d – Neither 1 nor 2
In this food chain: Grass → Grasshopper → Frog → Snake → Hawk, if the energy at the fourth trophic level is 3 kJ, how much energy did the producers originally contain?
a) 3 kJ
b) 30 kJ
c) 300 kJ
d) 3000 kJ
Explanation: Energy decreases by roughly 90% at each trophic level due to metabolic loss and Heat. If the snake (fourth level) has 3 kJ, the frog had ~30 kJ, the grasshopper ~300 kJ, and producers ~3,000 kJ. This demonstrates the 10% rule, showing limited energy transfer efficiency in food chains.
Like Money losing value through multiple intermediaries, energy diminishes along trophic levels.
Overall, producers originally contained 3,000 kJ of energy.
Option d – 3000 kJ
We covered all the biodiversity question Bankmcqs above in this post for free so that you can practice well for the exam.
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.
