Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest.

• Extinction
• Speciation
• Natural Selection
• Artificial Selection

Natural selection explains HOW organisms change over time. What is the process in which populations are changed over time?

• Digestion

• Elimination

• Evolution

• Adaptation

Another term for Natural Selection is:

• Breeding

• Commensulism

• Communism

• Survival of the fittest

Mutations are a change in what?

• DNA
• tRNA
• genotype
• phenotype

What word describes a trait that helps an organism survive in its environment?

• natural selection

• mutation

• camouflage

• adaptation

Why is the mouse population changing over time? (You can enlarge the picture by placing your cursor on it.)

• The light mice can reproduce more successfully than the dark mice

• The hawks eat more dark mice than light mice because the dark mice taste better

• The hawks eat more light mice than dark mice because they can see the light mice more easily

• The hawks eat more dark mice than light mice because they can see the dark mice more easily

Which organisms are most likely to survive?

• the best adapted (best fit)

• the fastest

• the strongest

• the most domesticated (tamed)

According to natural selection, light colored tree trunks would favor ___________________________.

• light colored moths

• dark colored moths

• red colored moths

• red and light colored moths

Why are advantageous (better fit) traits more likely to be passed onto offspring?

• They are more likely to survive and reproduce.

• They are more likely to die and not reproduce.

• They are able to reproduce more offspring.

A slight difference in an inherited trait between individual members of the same species. (Example: Some rabbits have white fur and some have black fur.)

• variations

• adapatations

• homologous structures

• analogous structures