what is the importance of DNA copying in reproduction?why is variations beneficial to the species but not necessary to an individual? explain
@ Ram: answer to your first question is nicely given by Knack.
I am providing you the answer for the second question.
@ Knack: Good answer!! We really appreciate your contribution to this forum. Keep posting!
It's because mutations can be fatal. Variation depends on mutations but most mutations are harmful. The one which is not fatal benefits the individual of course, but it is the species which benefits the most. Individuals themselves are therefore better off without mutations
no variation is beneficial in a population until and unless adverse conditions arrive .During adverse conditions , some variations may give survival advantage to some individuals , there by helping in the survival of the species