Natural Selection

By: *Crismery Andrade*

What is Natural Selection? & What does it mean to be fit in a species?

Natural selection: Gradual process by which heritable biological traits become either more or less common in a population as a function of the effect of inherited traits on the differential reproductive success of organisms interacting with their environment.

Fit: To be fit in a species means that you are able to reproduce.

An example of natural selection is: Skeletal Adaptions

What this form of natural selection means is that if members of the population didn't present or develop these skeletal changes they would eventually die out. It helps the organism live in an environment
Many know species like giraffes and lizards adapted to their environment through genetic changes to their skeletons.

Example: Giraffes developed long necks so they would be able to reach up to the tops of trees so they could eat. So if there were giraffes who didn't develop these long necks they would die out because they couldn't extend to reach their food.

Nature decides who is selected and who is not.