What Is Natural Selection? — Definition & Importance

A species like the tasmanian devil has very little genetic variation. All individuals among this species look alike and have the same traits.

Humans are able to pass their genetic information from parents to offspring through mating. This results in a child which is similar to the characteristics of the parent, but not exactly identical.

A species lives in a theoretical environment where there are infinite resources and therefore a lack of competition between individuals.

There is a variation in a population of giraffe such that those with longer necks are better able to reach leaves they want to eat.