In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: What process is most responsible for the extinction of most species of plants and animals that have lived on Earth? Answer: environmental changes
Environmental changes is most responsible for the extinction of most species of plants and animals that have lived on earth.

Question: Electrophiles have a strong tendency to react with what? Answer: nucleophiles
Electrophiles have a strong tendency to react with nucleophiles.

Question: What happens to evolution when equilibrium is reached within the genes of the population? Answer: it stops occurring

It stops occurring happens to evolution when equilibrium is reached within the genes of the population.