Paper 1 · People, Development and Environment
Which of the following statements are true in the context of an ecosystem?
- The transition area between two biomes is called an ecotone
- Species indigenous to an area are known as endemic species
- Species restricted to the ecotone that do not move into either biome are called edge species
- Species that play a significant role in the functioning of an ecosystem are called keystone species
A2, 3 and 4
B1, 2, 3 and 4 ✓ Correct
C3 and 4
D1, 3 and 4
Correct answer: (B) 1, 2, 3 and 4 — All four statements are true, so that is the answer.
Explanation
★All four statements are true, so that is the answer.
★The transition area between two biomes is indeed an ecotone.
★Species native to an area are indeed endemic species.
★Species confined to the ecotone are indeed edge species.
★Species vital to an ecosystem's functioning are indeed keystone species.
★So statements 1, 2, 3 and 4 are all true.
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