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This test consists of 5 multiple choice questions, 5 short answer questions, and 10 short essay questions.

Multiple Choice Questions

1. What typically happens to a species that begins to vary and forms two distinct species?
(a) They will require more resources.
(b) They will be classified as sub-species.
(c) One of the species will become extinct.
(d) They will inhabit more area.

2. Concerning the difficulty of defining species, sub-species, and variations, what does Darwin suggest about differences?
(a) Will depend on the climate.
(b) There are no differences.
(c) They are arbitrary.
(d) Will depend on the species.

3. What is unique about variation in polymorphic species?
(a) Dependent on external factors.
(b) Not dependent on external factors.
(c) Not dependent on internal factors.
(d) All invertibrates.

4. What happens to a species if their traits and characteristics are not passed down to the next generation?
(a) They will grow.
(b) They will become unique species.
(c) They will become extinct.
(d) They will change.

5. Where does Darwin suggest transitional forms should be found?
(a) In fossil records.
(b) Regions near mountains.
(c) In all regions.
(d) Regions near water.

Short Answer Questions

1. What do species survive to do?

2. What is one way to observe the change in a species in a controlled environment?

3. What is one reason that some species' traits are different from other species?

4. What is likely to NOT affect variations that are consistent among individuals?

5. What animal does Darwin use as an example of an intermediate form of a full-land and full-flying animal?

Short Essay Questions

1. Why is it sometimes impossible to tell if climate is the cause for variations in the same species located in different geographical locations?

2. How can the geology of mountains and valleys be related to natural selection?

3. What was Darwin's specific interest in the living species?

4. How does natural selection explain why organisms pair with other organisms?

5. What are four objections raised to the theory of natural selection?

6. Why are polymorphic species considered an extreme illustration of variation?

7. What can't all examples for disused organs be attributed to correlational growth?

8. What must be examined in order for Darwin's theory to be considered plausible?

9. What is the ultimate result of the constant struggle to live?

10. Why is natural selection much broader than domestic selection by humans?

(see the answer keys)

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