Natural Selection

Not all animals in a species are the same. We call these differences genetic variation.

Animals need to compete with each other for the resources (e.g. food, water, space) that they need to survive. Some features (for example long necks in giraffes) can help some animals to survive, which means that they are more likely to reproduce. This gives the next generation a better chance to survive. This process is called Natural Selection.

When Humans decide which plants or animals will reproduce, we call it Selective Breeding.