2. how does mass extinction affect species that survive?

a. there are no surviving species if a mass extinction occurs.

b. they will soon become extinct.

c. they combine gene pools.

d. they fill new roles in the changed environment.

Afarmer has applied a pesticide to control a pest population that is affecting her crops. the pest population has reacted as shown below. which best describes the process that the pest population has experienced due to this environmental change? a genetic diversity b natural selection c natural resistance d genetic resistance

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating

How water is moving through the ecosystem ?