Continuity and Change D.10 Natural Selection (id: 66a3bb31c)

本题目来源于试卷: Continuity and Change D.10 Natural Selection，类别为 IB生物学

[单选题]
As pollution levels rise, the trees that 5iddb+hqneh:8+ 2a gv the peppered moth (Biston betula /a0ibongr 2 2cf3ntb2ria) lives on will become darker. What effebr /ti3 22agcb 2nofn0ct will this have on the peppered moth population numbers?

A. Numbers of peppered moths will decrease
B. Numbers of peppered moths will increase and then stabilise
C. Numbers of peppered moths will remain constant
D. Numbers of peppered moths will increase


参考答案:  A


本题详细解析:
Choices B, C and D are incorrect because as the trees get darker, the camouflage of the peppered moth will be less effective, meaning it is more visible to predators and therefore more likely to be eaten.

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