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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.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
If the Assertion is correct but Reason is incorrect.
If both the Assertion and Reason are incorrect.
Solution
The Darwin's theory of Natural Selection can be generalised as the change in species by the survival of an organism exhibiting a natural variation that gives it an adaptive advantage in an environment. Thus, leading to a new environmental equilibrium. The idea of the survival of the fittest explains the above evolution by natural selection. According to survival of the fittest, some of the variations exhibited by living things make it easier for them to survive and reproduce. Thus, more adaptive forms increase. Those which are not fit (or less adaptive) are eliminated.
Similar Questions
Match the columns :
| Column – $I$ | Column – $II$ |
| $(1)$ Charles Darwin | $(a)$ Mutation theory |
| $(2)$ Lamarck | $(b)$ Germ plasm theory |
| $(3)$ Hugo de vries | $(c)$ Philosophie zoologique |
| $(4)$ Ernst Haeckel | $(d)$ The origin of species |
| $(5)$ August Weismann | $(e)$ Biogenetic law |
| $(f)$ Eassy on population |
