Question

Variation is useful for the survival of species overtime but the variants have unequal chances of survival. Justify ?

Answer 1

depending on the nature of variation different organism have different advantages
eg: bacteria variants which can tolerate heat have high survival chance than the non-variant bacteria that have no capacity to tolerate heat.
however not all variations are beneficial or useful.

Answer 2

Answer:

Explanation

Variations which are favourable, increase the chances of survival of the species. It forms the basis of evolution e.g. If an organism can withstand a little higher temperature, then the variation goes on accumulating in its future generations. Hence, these organisms can survive when there is sudden rise in the temperature.This ensures the survival of the species. But some other organisms (variants) without this variation of heat resistance may not survive due to sudden rise in temperature. So, variation is beneficial to the species, but not necessarily for individual.