Island Biogeographic model predicts about _?

D. Both extinction and immigration rates

C. Species richness based on island size and distance from mainland

D. Both extinction and immigration rates

Charles Elton defined the niche as species _?

D. Ecosystem role and habitat combined

Protected area managed mainly for conservation through management intervention?

D. Protected Landscape/Seascape

Major human activity which destroys wildlife is _?

C. Habitat destruction due to urbanization

Everyday Science · Environment, Weather & Ecology · page 3 of 40

Ecosystem MCQs with Answers

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Ecosystem, Biodiversity & Conservation MCQs (21–30)

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Past paper MCQs in this chapter · See all past papers

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21.
Island Biogeographic model predicts about _?
Correct Answer: D. Both extinction and immigration rates
One-liner
The Island Biogeography model predicts both extinction and immigration rates, which together determine the equilibrium number of species on an island.
22.
Which living thing would decrease, if the number of frogs increased?
Correct Answer: C. Grasshoppers
One-liner
If the number of frogs increased, the population of grasshoppers would decrease because frogs are predators that feed on insects like grasshoppers.
23.
Which one of the following is a non-biodegradable material?
Correct Answer: D. Plastic
One-liner
Plastic is a non-biodegradable material because it cannot be broken down by microorganisms naturally.
24.
Past Paper MCQ
In an ecosystem, what form is nitrogen converted into to make it available to primary producers like plants?
Correct Answer: B. Ammonia
One-liner
Nitrogen is converted into ammonia (or ammonium ions) to make it available to primary producers like plants.
25.
Charles Elton defined the niche as species _?
Correct Answer: B. Occupation
One-liner
Charles Elton defined the niche as the species' occupation — what it does in its community, not just where it lives.
26.
Protected area managed mainly for conservation through management intervention?
Correct Answer: B. Habitat/Species management
One-liner
A protected area managed mainly for conservation through management intervention is known as a Habitat/Species management area.
27.
Which of the following factor increases edge effects?
Correct Answer: A. Habitat fragmentation
One-liner
Edge effects are increased by habitat fragmentation, which creates more boundary zones between different habitat types.
28.
Exotic species are also known as ?
Correct Answer: D. Both A and B
One-liner
Exotic species are also known as Both A and B (Alien species and Introduced species).
29.
Major human activity which destroys wildlife is _?
Correct Answer: D. All of these
One-liner
The major human activities that destroy wildlife include deforestation, overhunting/poaching, and habitat destruction due to urbanization — so the correct answer is All of these.
30.
Bacteria are decomposers, what component of environment are they considered?
Correct Answer: D. Biotic
One-liner
Bacteria are decomposers and are considered a biotic component of the environment.

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Ecosystem MCQs with Answers

Ecosystem, Biodiversity & Conservation MCQs (21–30)

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