Natural Selection a Case Study

1. The speckled form of the peppered moth is adapted to

A cold weather.

B food shortage.

C avoid disease.

D avoid predation.

2. The term melanic means

A well adapted.

B poorly adapted.

C coloured black.

D light coloured.

3. In the early 19^th century melanic moths failed to breed

because they

A could not breed with speckled moths.

B were usually killed by predators.

C were camouflaged against light – coloured trees.

D were not often eaten by robins.

4. Burning large qualities of coal changed the environment by

A making speckled moths dirty with soot.

B poisoning lichens and causing blackening of exposed surfaces.

C giving the predators of melanic moths a better chance of survival.

D poisoning speckled moths.

5. Natural selection allowed melanic moths to survive in industrial

areas because

A the tree trunks were light coloured.

B they were camouflaged well.

C robins ate more of them.

D speckled moths bred with them.

Question 6 and 7 refer to the map below.

The pie charts show the distribution of speckled and

melanic varieties of the peppered moth in England and Wales.

6. In which area are less than 25% of the moths melanic?

7. In which area are there least speckled moths?

8. The varieties of the peppered moth have not become

two species because

A the two varieties still interbreed regularly.

B speckled moths do not breed with melanic moths.

C melanic moths are sterile.

D speckled moths do not occur in polluted areas.