Question

how variation is important

Answer 1

Variation is an important force in evolution as it allows natural selection to increase or decrease frequency of alleles already in the population.

Answer 2

Hiii Mate ...
Variation is important because it increases the chances of survival of species in a changing environment.
For exa. Some bacteria can survive in higher temperatue which increases due to heat wave or other reasons but some bacteria have not variation to withstand heat and they can'nt survive under these circumstances and hence die.
Hope it will help u.
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