Natural Selection & Evolution – Check Test

1. Mice can produce many more young than can survive because

A they have very large reproductive organs.

B they take a long time to become sexually mature.

C they have small litters.

D they have large litters and become sexually mature very quickly.

2. The factors which prevent the survival of all offspring include

A predation and disease.

B abundant food and shelter.

C climate and absence of predators.

D absence of disease and abundant food.

3. The offspring of a pair of mice are not genetically identical

because they

A have the same parents.

B grow up in the same environment.

C have different phenotypes.

D are produced by sexual reproduction.

4. Natural selection is a process in which

A differently adapted organisms survive equally well.

B the best adapted varieties survive and others become extinct.

C different environments are formed over millions of years.

D all varieties survive to breed.

5. Natural selection

A favours better adapted organisms.

B causes variation in a species.

C allows sexual reproduction in a species.

D does not affect evolution.

6. Evolution

A causes variety in a species.

B is the appearance of new species.

C allows a species to survive.

D is a rapid process.

7. The list gives events in the evolution of cichlid fish

species in Lake Victoria.

1 New species evolve.

2 Natural selection operates in each lake.

3 Lake splits up into smaller lakes.

4 Different foods are available in different lakes.

What is the correct order of these events?

A 4, 3, 2, 1

B 3, 4, 1, 2

C 1, 2, 3, 4

D 3, 4, 2, 1

8. Cichlid fish species differ mainly in the shape of their

A eyes and tails.

B tails and teeth.

C teeth and jaws.

D jaws and eyes.