unit 4.2 natural selection

Define natural selection

Define selective agent

What is the difference between biotic factors & abiotic factors?

Define selection pressure.

Most selective agents act by killing individuals & are often less suited to surviving & refer to 'poorly adapted' or 'less fit'. Give an example.

define sexual selection

Define variation

what is a more modern definition for natural selection?

Give evidence for natural selection

What was the peppered moth?

Explain Kettlewells experiment on peppered moths

What are insecticides?

Define resistance

How did Alexander Fleming find a way to kill bacteria?

Define antibiotics

Name a dangerous type of bacteria

Define biodiversity

Define Speciation

What are the 3 steps of the process of speciation?