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Question

In a population of red beetles thriving in a bush, a green variant arises. The green beetle can easily escape the crow (predator). Identify the correct statement based on this information.

A
This is an example of genetic drift
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B
Colour variation always offers survival advantage
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C
This is an example of natural selection
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D
Green colour of the beetle is an acquired trait
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Solution

The correct option is C This is an example of natural selection
  • Green beetles cannot be easily spotted by the crow. As a result their population increases. On the other hand, red beetles can be easily spotted by the crow. Hence their population declines. This is an example of natural selection.
  • The natural selection here is exerted by the crows. They can easily identify their prey (in this case, the red beetles), consequently green beetles will survive the predation and their number will increase. So, natural selection is directing evolution in the beetle population.

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