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Biodiversity and Conservation MCQ. We covered all the Biodiversity and Conservation MCQ in this post for free so that you can practice well for the exam.
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Biodiversity and Conservation MCQ for Students
Which of the following organisms function as decomposers?
(a) Animalia and Monera
(b) Protista and Monera
(c) Fungi and Plantae
(d) Bacteria and Fungi
Option d – Bacteria and Fungi
Can an ecosystem containing grass, plants, rats, deer, dogs, horses, and lions be sustainable?
(a) No, it lacks decomposers despite having producers and consumers
(b) Yes, it includes both producers and consumers
(c) No, because dogs do not have access to their typical prey like cats
(d) Yes, all trophic levels required for energy flow are present
Option d – Yes, all trophic levels required for energy flow are present
How is energy transferred in a food chain?
(a) It can move back to lower levels
(b) It does not return to previous levels
(c) It is partly used for metabolic activities and partly lost to the environment
(d) Both (b) and (c)
Option c – It is partly used for metabolic activities and partly lost to the environment
Which of the following groups do not represent a food chain?
(i) Grass, lion, rabbit, wolf
(ii) Plankton, man, fish, grasshopper
(iii) Wolf, grass, snake, tiger
(iv) Frog, snake, eagle, grass, grasshopper
(a) (i) and (iii)
(b) (iii) and (iv)
(c) (ii) and (iii)
(d) (i) and (iv)
Option d – (i) and (iv)
Why do our foods contain pesticide residues?
(a) Due to biological magnification
(b) Because agricultural chemicals stay in fruits and seeds via soil and water
(c) Because of chemical reactions between spices and other substances during cooking
(d) Both (a) and (b)
Option d – Both (a) and (b)
Which of the following represents an inverted ecological pyramid?
(a) Number pyramid in grassland
(b) Energy pyramid in pond system
(c) Biomass pyramid in grassland
(d) Biomass pyramid in pond ecosystem
Option d – Biomass pyramid in pond ecosystem
What occurs in an ecosystem as part of its abiotic components?
(a) Energy movement
(b) Recycling of matter
(c) Presence of consumers
(d) Both (a) and (b)
Option d – Both (a) and (b)
Arrange these ecosystems in decreasing order of productivity:
(a) Oceans, lakes, grasslands, mangroves
(b) Mangroves, oceans, grasslands, lakes
(c) Mangroves, grasslands, lakes, oceans
(d) Oceans, mangroves, lakes, grasslands
Option c – Mangroves, grasslands, lakes, oceans
Which of the following act as decomposers in food chains?
- Virus
- Fungi
- Bacteria
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Option b – 2 and 3 only
Match the following locations correctly:
- Nokrek Biosphere – Garo Hills
- Loktak Lake – Barail Range
- Namdapha National Park – Dafla Hills
(a) 1 only
(b) 2 and 3 only
(c) 1, 2, and 3
(d) None
Option a – 1 only
Which of the following is not considered an ecosystem?
(a) Forest
(b) Grassland
(c) Garden
(d) Sun
Option d – Sun
Identify the artificial ecosystem:
(a) Forest
(b) Lakes
(c) Aquarium
(d) Ponds
Option c – Aquarium
All producers can be described as:
(a) Organisms that manufacture food
(b) Organisms that make food using sunlight and chlorophyll
(c) Autotrophs
(d) All of the above
Option d – All of the above
Choose the odd one out:
(a) Goat
(b) Lion
(c) Leech
(d) Grass
Option c – Leech
Which of the following represents the second trophic level?
(a) Fungi
(b) Bacteria
(c) Goats
(d) Neem tree
Option c – Goats
Which of these animals are native to India?
- Star tortoise
- Monitor lizard
- Pygmy hog
- Spider monkey
(a) 1, 2, and 3 only
(b) 2 and 3 only
(c) 1 and 4 only
(d) 1, 2, 3 and 4
Option a – 1, 2, and 3 only
Why do grasses dominate in grasslands and not trees?
(a) Due to insects and fungi
(b) Because of lack of sunlight and nutrients
(c) Due to limited water and frequent fires
(d) None of the above
Option c – Due to limited water and frequent fires
A food chain that begins with microbes decomposing organic matter is called a
(a) Ecosystem
(b) Detritus food chain
(c) Parasitic food chain
(d) Predator food chain
Option b – Detritus food chain
The path through which organic material passes in an ecosystem is called a
(a) Energy pyramid
(b) Nutrient cycle
(c) Food chain
(d) Food web
Option c – Food chain
Why are food webs common in ecosystems?
(a) Consumers rely on various food sources rather than a single chain
(b) Multiple food chains interconnect to form webs
(c) Both (a) and (b)
(d) None of these
Option c – Both (a) and (b)
Choose the correct food chain sequence from plants, birds, lions, snakes, and ants:
(a) Plants, birds, snakes, lions, and ants
(b) Plants, ants, birds, snakes, and lions
(c) Plants, birds, lions, snakes, and ants
(d) Plants, snakes, ants, birds, lions
Option b – Plants, ants, birds, snakes, and lions
What term describes both the physical space and functional role of an organism?
(a) Ecotone
(b) Ecological niche
(c) Habitat
(d) Home range
Option b – Ecological niche
What are microorganisms that decompose organic waste and dead organisms called?
(a) Vultures
(b) Decomposers
(c) Omnivores
(d) None of these
Option b – Decomposers
Why is using disposable plastic plates discouraged?
(a) Because they are lightweight
(b) Because they contain toxic substances
(c) Because they are biodegradable
(d) Because they are not biodegradable
Option d – Because they are not biodegradable
What is the process called where pesticide levels increase at each trophic level?
(a) Eutrophication
(b) Pollution
(c) Biomagnification
(d) Accumulation
Option c – Biomagnification
What is the role of decomposers in an ecosystem?
(a) They transform inorganic materials into simpler substances.
(b) They convert organic matter into inorganic compounds.
(c) They synthesize organic substances from inorganic materials.
(d) They do not degrade organic substances.
The process by which green plants and certain cyanobacteria create organic food using sunlight, water, and carbon dioxide in the presence of chlorophyll is known as
(a) respiration
(b) photosynthesis
(c) oxidation
(d) sustenance
Option b – photosynthesis
The reliance of organisms on one another for food and survival is illustrated through
(a) ecosystem
(b) biosphere
(c) food chains
(d) heterotrophs
Option c – food chains
Each stage within a food chain represents a
(a) trophic level
(b) food web
(c) layer
(d) crust
Option a – trophic level
Environmental interactions include the transfer of
(a) genetic material
(b) food particles
(c) energy
(d) oxygen
Option c – energy
Identify the incorrect statement:
(a) All green plants and blue-green algae act as producers.
(b) Green plants derive nutrition from organic matter.
(c) Producers manufacture their own food from inorganic sources.
(d) Plants use sunlight to produce chemical energy.
Ecosystems are categorized into
(a) mountain ranges and aquariums
(b) natural systems like forests, ponds, and lakes
(c) man-made systems such as crop fields and gardens
(d) Both (b) and (c)
Option d – Both (b) and (c)
All consumers—be they herbivores, carnivores, or parasites—ultimately rely on
(a) producers or vegetation
(b) atmospheric air
(c) water sources
(d) sunlight
Option a – producers or vegetation
Which of the following are decomposers?
(a) Animalia and Monera
(b) Protista and Monera
(c) Fungi and Plantae
(d) Bacteria and Fungi
Option d – Bacteria and Fungi
What is the environmental concern with excessive use of disposable packaging?
(a) It increases user convenience.
(b) It adds to non-biodegradable waste.
(c) It’s hygienic and safe for use.
(d) All of the above
Option b – It adds to non-biodegradable waste
When on a trip, the eco-friendly choice for tea would be
(a) a paper cup
(b) a clay kulhad
(c) a plastic disposable cup
(d) any cup available
Option a – a paper cup
Can an ecosystem with grass, plants, rats, deer, dogs, horses, and lions be sustainable?
(a) No, because it lacks decomposers
(b) Yes, it includes producers and consumers
(c) No, as dogs cannot access their usual prey
(d) Yes, it supports a complete energy transfer system
Option d – Yes, it supports a complete energy transfer system
What is a sustainable method to manage waste?
(a) Separating biodegradable and non-biodegradable waste
(b) Converting biodegradable waste into useful products
(c) Treating industrial waste and sewage before releasing into water
(d) All of the above
Option d – All of the above
Which among the following represents an inverted ecological pyramid?
(a) Pyramid of numbers in a grassland
(b) Pyramid of energy in pond habitat
(c) Pyramid of biomass in grasslands
(d) Pyramid of biomass in aquatic ecosystems
Option d – Pyramid of biomass in aquatic ecosystems
Which processes represent abiotic interactions in ecosystems?
(a) Movement of energy
(b) Recycling of nutrients
(c) Consumer interactions
(d) Both (a) and (b)
Option d – Both (a) and (b)
Food webs dominate in ecosystems because
(a) Consumers don’t rely on just one source of food
(b) Food chains link to form webs
(c) Both (a) and (b)
(d) None of the above
Option c – Both (a) and (b)
Identify the correct order of organisms in a food chain: plants, ants, birds, lions, and snakes.
(a) Plants → birds → snakes → lions → ants
(b) Plants → ants → birds → snakes → lions
(c) Plants → birds → lions → snakes → ants
(d) Plants → snakes → ants → birds → lions
Option b – Plants → ants → birds → snakes → lions
What is a food chain where microbes break down energy-rich organic matter called?
(a) Ecosystem
(b) Detritus food chain
(c) Parasitic food chain
(d) Predator food chain
Option b – Detritus food chain
The order through which organisms consume and pass energy in a community is known as
(a) Energy pyramid
(b) Nutrient cycle
(c) Food chain
(d) Food web
Option c – Food chain
What portion of energy is transferred from one trophic level to the next?
(a) All the energy
(b) Only the organic fraction
(c) 10% of energy from the previous level
(d) 50% of energy from the previous level
Option c – 10% of energy from the previous level
Once energy moves up the food chain
(a) it can return to the lower level
(b) it does not revert back to lower levels
(c) it is used in body functions or lost as heat
(d) Both (b) and (c)
Option b – it does not revert back to lower levels
The approximate percentage of solar energy used by green plants in photosynthesis is
(a) 1%
(b) 5%
(c) 8%
(d) 10%
Option a – 1%
Why do pesticide residues persist in our food?
(a) Due to bioaccumulation
(b) Because agricultural chemicals remain in seeds and fruits via soil and water
(c) Due to chemical reactions with spices and cooking
(d) Both (a) and (b)
Option d – Both (a) and (b)
Which of the following does not contribute to ozone formation?
(a) Ozone is a harmful gas.
(b) Sunlight’s UV rays split oxygen into individual atoms.
(c) Atomic oxygen reacts with O₂ to generate ozone.
(d) Ozone develops in the upper atmosphere.
Option a – Ozone is a harmful gas
Why is protecting the ozone layer important?
(a) It filters harmful ultraviolet rays.
(b) It is threatened by chlorofluorocarbons.
(c) Both (a) and (b)
(d) It’s not essential as it supposedly increases oxygen.
Option c – Both (a) and (b)
Typically, how many energy levels exist in a food chain? ( Biodiversity and Conservation MCQ )
(a) One
(b) Four
(c) Many
(d) Five
Option d – Five
Green plants in land-based ecosystems convert 1% of solar energy into
(a) food energy
(b) muscular energy
(c) electric energy
(d) stored energy
Option a – food energy
Numerous interactions among food chains form a ( Biodiversity and Conservation MCQ )
(a) Ecosystem
(b) Biome
(c) Food web
(d) Environment
Option c – Food web
Extended food chains tend to have ( Biodiversity and Conservation MCQ )
(a) more energy content
(b) reduced energy available
(c) constant energy throughout
(d) none of the above
Option b – reduced energy available
The combination of living organisms and physical conditions creates
(a) Environment
(b) Earth
(c) An ecosystem
(d) All of the above
Option c – An ecosystem
The final component in all food chains is ( Biodiversity and Conservation MCQ )
(a) Producers
(b) Decomposers
(c) Parasites
(d) None of these
Option b – Decomposers
What is the primary task of producers in an ecosystem?
(a) Change organic material into inorganic matter
(b) Convert solar power into chemical energy
(c) Use up chemical energy
(d) Release stored energy
Which group is also known as saprophytes? ( Biodiversity and Conservation MCQ )
(a) Producers
(b) Consumers
(c) Decomposers
(d) Parasites
Option c – Decomposers
A broad ecosystem that includes distinct plants and animals is called a
(a) Habitat
(b) Biome
(c) Biomass
(d) Biota
Option b – Biome
The gradual build-up of toxic substances through different levels of a food chain is called ( Biodiversity and Conservation MCQ )
(a) Accumulation
(b) Nutrient pollution
(c) Environmental contamination
(d) Biomagnification
Option d – Biomagnification
The third level in a food chain is typically occupied by
(a) Carnivores
(b) Herbivores
(c) Decomposers
(d) Producers
Option a – Carnivores
Energy in ecosystems moves in a ( Biodiversity and Conservation MCQ )
(a) One-way path
(b) Reversible direction
(c) Multidirectional flow
(d) No set pattern
Option a – One-way path
When organic waste decomposes, it ( Biodiversity and Conservation MCQ )
(a) Blends with soil
(b) Enriches soil fertility
(c) Minimizes pollution
(d) All of the above
Option d – All of the above
In the sequence: Crops → X → Snake → Y → Decomposers, X and Y are
(a) Crows, Vultures
(b) Crows, Hawk
(c) Rats, Dog
(d) Rats, Geese
Option d – Rats, Geese
What role do green plants play in food chains? ( Biodiversity and Conservation MCQ )
(a) Decomposers
(b) Producers
(c) Consumers
(d) None of these
Option b – Producers
What are biodegradable substances?
(a) Those decomposed by microbes like bacteria
(b) Those unaffected by heat and pressure
(c) Those that remain long in the environment
(d) Those that harm organisms in the food web
Option a – Those decomposed by microbes like bacteria
Identify the non-biodegradable material. ( Biodiversity and Conservation MCQ )
(a) Plastic
(b) Cotton fabric
(c) Leaves
(d) Vegetable scraps
Option a – Plastic
A combination of living beings and non-living components in a region forms an ( Biodiversity and Conservation MCQ )
(a) Community
(b) Ecosystem
(c) Atmosphere
(d) Soil
Option b – Ecosystem
An ecosystem comprises ( Biodiversity and Conservation MCQ )
(a) Living things only
(b) Non-living physical factors only
(c) Both living and non-living elements
(d) Neither of these
Option c – Both living and non-living elements
Which of the following is considered an abiotic element?
(a) Humus
(b) Microorganisms
(c) Vegetation
(d) Fungi
Option a – Humus
Who introduced the concept of the ecosystem? ( Biodiversity and Conservation MCQ )
(a) Tansley
(b) Odum
(c) Warming
(d) Darwin
Option a – Tansley
Which substance has recently been phased out? ( Biodiversity and Conservation MCQ )
(a) Malathion
(b) CFCs
(c) Chloroform
(d) Ethylene dibromide
Option b – CFCs
What influences the life processes of organisms? ( Biodiversity and Conservation MCQ )
(a) Only non-living factors
(b) Only living factors
(c) Both living and non-living factors
(d) Other unknown elements
Option c – Both living and non-living factors
Carnivorous animals fall under
(a) First-level consumers
(b) Secondary and tertiary consumers
(c) Reducers
(d) Aquatic plankton
Option b – Secondary and tertiary consumers
An example of non-biodegradable waste is ( Biodiversity and Conservation MCQ )
(a) Trash
(b) Metal objects
(c) Wastewater
(d) Old paper
Option b – Metal objects
Which is not an example of a food chain? ( Biodiversity and Conservation MCQ )
(a) Tree → Deer → Lion
(b) Plants → Human → Anaconda
(c) Plants → Insect → Frog → Snake → Kite
(d) Algae → Crabs → Fish → Swan → Bird
Option b – Plants → Human → Anaconda
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