Question

why is variation beneficial for the species but not necessarily for the individual

Answer 1

Variations are beneficial to the species than individual because sometimes for a species, the environmental conditions change so drastically that their survival becomes difficult. ... However, all variations are not necessarily beneficial for the individual organisms.

Answer 2

Variations are benefitial for species not for individuals becoz. in species sexual mode of reproduction takes place . Sexual reproduction of organisms produces variations. The variations produced in organisms during successive generations get accumulated in the organisms. THE significance of a variation shows up only if it continues to be inherited by the offspring for several generations.