Unit 6 Review

Which of the following describes what is meant by Natural Selection?

• An organism will survive no matter what its adaptations may be

• An organism with adaptations that do not allow it to reproduce as effectively as others will survive.

• An organism with adaptations that allow it to obtain resources and reproduce more effectively than others will survive.

• No organisms will survive.

Which best describes an adaptation?

• A trait that helps an organism to survive in its environment.
• A trait that the organism can change when he wants.
• A trait that does not help the organism to survive in its environment.
• The place where an organism lives.

What does the term variation mean?

• The same traits in a population.
• The different ways that traits are expressed in a population.
• The same ways traits are expressed in a population.
• The place where an animal lives.

What does the term species mean?

• All the different organisms in a population

• A community of organisms.

• Organisms of the same kind that can reproduce with one another and create fertile young.

• Organisms of different kinds that can reproduce with one another.

Which of the following variations would help members of a rabbit population survive if the climate turned very hot?

• Thinner fur
• Ability to run faster
• Ability to jump higher
• Ability to eat more

Charles Darwin's work contributed to the theory of Natural Selection

• True
• False

Animals are born with their adaptations due to genes.

• True
• False

Animals are able to pick and choose their adaptations.

• True
• False

Variations are differences between individuals in a population.

• True
• False

Over time natural selection can change how often a trait is seen within a population.

• True

• False