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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 6: Difficulties on Theory.

Multiple Choice Questions

1. What happens when species are inter-bred?
(a) Offspring are weaker.
(b) Variations die out.
(c) Offspring are stronger.
(d) Variations increase.

2. How is the practice of purposeful selection seen throughout history?
(a) Written records.
(b) No change in species.
(c) Natural change in species.
(d) Relics from ancient civilizations.

3. Why do domestic ducks have lighter wings and heavier feet then wild ducks?
(a) Domestic ducks walk more.
(b) This is a false statement.
(c) Different species.
(d) Domestic ducks walk less.

4. What do scientists attribute to organs that cannot be explained by natural selection?
(a) Use.
(b) Disuse.
(c) Overuse.
(d) Inheritance.

5. What aspect of organisms is not caused by chance?
(a) Variation.
(b) Location.
(c) Gender.
(d) Size.

Short Answer Questions

1. What is one function that cave dwelling animals lost through natural selection?

2. What other actions do birds use their wings for?

3. In extreme environments, what are species in competition with?

4. What does natural selection favor in terms of increasing population?

5. What is the best example of traits that continue to vary?

(see the answer key)

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