Question

What is variation? How is variation created in a population? How does the creation of variation in a species promote survival?

Answer 1

Variation, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors.

Mutation is the original source of genetic variation. Even in a population in which all copies of a chromosome were identical, new genetic variants would arise by mutation.

Variants help the species to survive in all the conditions. Environmental conditions such as heat, light, pests, and food availability can change suddenly at only one place. If variants were not there, the entire species would have been destroyed.