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.

This is an example of genetic drift

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Colour variation always offers survival advantage

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This is an example of natural selection

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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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Similar questions

Red-coloured beetles are living on green leaves of bushes. These beetles increase in numbers by sexual reproduction. Crows, being their predators, consume beetles and regulate their population. During reproduction, few beetles develop green colour instead of red colour. This variation in body colour gives green coloured beetles an advantage and over the years, the number of green beetles in the population will increase generation after generation.
Which of the following statements are correct regarding the given paragraph:
(i) The given paragraph depicts an example of "ontogeny recapitulates phylogeny".
(ii) Artificial selection is exerted by crows.
(iii) Natural selection is exerted by crows.
(iv) More red-coloured beetles will be eaten up.
(v) The given paragraph depicts an example of convergent evolution.

Q. Read the given paragraph carefully:
Red-coloured beetles are living on green leaves of bushes. These beetles increase in numbers by sexual reproduction. Crows, being their predators, consume beetles and regulate their population. During reproduction, few beetles develop green colour instead of red colour. This variation in body colour gives green coloured beetles an advantage and over the years, the number of green beetles in the population will increase generation after generation.
Which of the following statements are correct regarding the given paragraph:
(i) The given paragraph depicts an example of "ontogeny recapitulates phylogeny".
(ii) Artificial selection is exerted by crows.
(iii) Natural selection is exerted by crows.
(iv) More red-coloured beetles will be eaten up.
(v) The given paragraph depicts an example of convergent evolution.

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