Biology
Grade-9
Easy
Question
Natural selection favored darker moths to survive in industrial areas because?
- The tree trunks were light in color.
- The dark tree trunks camouflaged the dark moths.
- Robins ate most of the dark moths.
- The speckled moths bred with the darker moths.
Hint:
The phenotypic shift was not caused by pollutants making the moths darker
The correct answer is: The dark tree trunks camouflaged the dark moths.
Initially, most moths were of the pale form that were easily disguised against the pale birch trees. During the second part of the nineteenth century, soot from airborne pollutants in industrial districts darkened the bark of birch trees. This benefited the black type since they were more likely to live and reproduce.
Hence, natural selection favored darker moths to survive in industrial areas because the dark tree trunks camouflaged the dark moths.
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