How does mass extinction affect species that survive?

There are no surviving species if a mass extinction occurs.

They will soon become extinct.

They combine gene pools.

They fill new roles in the changed environment.

When there is a mass extinction, species that survive will combine gene pools. A gene pool is the sum of population of same species have the same genetic material. Those species that survived will combine for them to survive from extinction. If there is a combination of gene pool then there will be a possibility that evolution will happen