The figure below depicts a situation where a rare variation has become common. The green coloured beetle population has become common because it gave them a survival advantage. This is an example of:

Artificial selection

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Natural selection

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Accidental selection

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Random selection

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Solution

The correct option is B Natural selection
When a population of a particular variant organism increases due to a survival advantage, it is the natural selection. In this case, green beetles cannot be seen by the crow and therefore, their population has grown compared to the red coloured beetles. Thus, the natural selection pressure is exerted by crows.

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Similar questions

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.

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. Assertion :Natural selection is the outcome of difference in survival and reproduction among individuals that show variation in one or more traits. Reason: Adaptive forms of a given trait tend to become more common, less adaptive ones become less common or disappear.

Q. The species of green beetle has evolved from the species of red beetle. This is an example of:

A population of red beetles lives in green bushes in a garden. Once during the process of breeding, a green beetle is produced.
(a) State whether the change in colour of beetle is a process of evolution or not.
(b) Can the new colour of green beetle be passed on to its next generations?
(c) What will be the advantage (if any) of the green colour to the beetle?
(d) State whether the production of green colour involved a change in genetic material or not.

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