Question

How do species evolve?

Answer 1

Biologists believe that new species evolve from existing species by a process called natural selection. ... Organisms that inherit that favorable new gene are likely to become more abundant than others of the species. Sometimes the population of a species becomes separated into two areas, by geography or by climate.

Answer 2

Natural selection.

Step-by-step explanation:

Animals mate with different animals creating a species with different genes that helps their kin live longer or stronger.