Multiple choice

1. What is meant by the phrase "evolution through natural selection"?

Living organisms that are badly suited to survive in their environment are able to modify their genes to make themselves better suited to their environment.

Living organisms that are better suited to their environment are more likely to survive, reproduce, and pass their genes on to the next generation.

Living organisms that encounter changes in their environment are able to modify their genes to survive the change.

Living organisms that are badly suited to their environment are less likely to survive and reproduce, which makes it less likely that they will pass their genes on to the next generation.

both b and d

2. Which of the following individuals is/are credited with stating the theory of evolution through natural selection?

Francis Crick

Charles Darwin

Rosalind Franklin

Carolus Linneaus

Barbara McClintock

Gregor Mendel

Alfred Wallace

James Watson

Charles Darwin and Alfred Wallace

3. What is an adaptive trait?

a characteristic whose genes are located on the X or Y chromosome

a feature that is no longer used by the organism

the particular features that allow an organism to survive in a particular environment

the characteristic expressed when the genotype is heterozygous

4. Consider a man with the genotype Bb who leaves his country of birth and moves to another country where all of the people have the genotype BB. He marries a BB woman and they have a Bb child. Is this an example of gene flow or genetic drift?

gene flow

genetic drift

neither of the above