Pollution, Climate Change and Conservation — O/L Science

How do I practise Pollution, Climate Change and Conservation?

1 question with a worked solution · 5 marks

1. 2020 · Paper II · 5 marks
   Question 10 shows a five-link garden food chain as a diagram. It asks you to identify the producer and the apex predator, to say what would happen to one population if a predator above it were removed and explain why, and to define the term ecosystem.
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   (i) Producer: Cabbage. Apex predator: Hawk. (ii) The frog population would INCREASE because the snake (frog's predator) is removed; fewer frogs are eaten. Over time caterpillar numbers would decrease because more frogs eat them. (iii) An ecosystem is a community of living organisms interacting with each other and with their non-living environment in a particular area.
   Source: Department of Examinations, Sri Lanka — G.C.E. O/L Science 2020, Paper II, Question 10 · https://doenets.lk/pastpapers

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