4.6.3.6 Extinction

Question 1

Extinction:

Answer 1

occurs when there are no remaining individuals of a species still alive

Question 2

Factors which may contribute to the extinction of a species:

Answer 2

1. Population growth
2. Habitat loss/destruction
3. Over consumption / over exploitation
4. Pollution
5. New predators may have evolved or migrated to the area
6. Have to compete with a species which has advantageous mutations for the same food source
7. Changes in environment which the species cannot adapt fast enough to
8. A new disease and there are no resistant alleles to it
9. Catastrophic event can wipe out a species e.g. meteroite