Question

For natural selection to happen, there must be variation present in a population. This is true because in a population without variation

Select one:

a. Change between generations can't happen

b. If there is only one trait, it must be advantageous, and thus change is not necessary.

c. There is no inter-individual competition.

d. Offspring never inherit mutations.

Answer 1

Answer : Change between generations can't happen.

Natural selection plays an important role in evolution as nature selects only those organisms which are fit to live. (Survival of the fittest) and the others perish away.

Variation is necessary for natural selection to occur.If there is no variation, a population cannot evolve in accordance to the changing environment.

Thus there is a risk of extinction for that population.

Change between generations is the law of nature..because if the next generation is not advanced than the previous generation, evolution cannot take place.

Option b cannot be selected as it says change is not necessary, which is not true.

Option c cannot be selected as competition is an unavoidable circumstance for the natural selection to occur.

Also Option d is incorrect as mutations are the raw materials of variation as variations are caused by mutations. And as per the natural selection theory, variations occur from generation to generation.Thus inheritance of mutations is necessary for evolution to occur.