Question 38
Question 38 of 40
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
18. Classification, biodi...
18.2. Biodiversity

define the terms ecosystem and niche

18. Classification, biodi...
18.3. Conservation

explain why populations and species can become extinct as a result of: • climate change • competition • hunting by humans • degradation and loss of habitats