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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 type of populations may be more likely to become extinct?
(a) Large populations.
(b) Medium populations.
(c) Small populations.
(d) Diverse populations.

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

3. What is the best example of traits that continue to vary?
(a) Primary sexual characteristics.
(b) Migration characteristics.
(c) Secondary sexual characteristics.
(d) Mating habits.

4. What would increase the likelihood of variations occurring in a given population?
(a) Fewer members of the species to compete with.
(b) Increase in available food.
(c) Dramatic environmental changes.
(d) Domestication.

5. What does natural selection say must be true for change to be preserved?
(a) It must be unique.
(b) It must be genetic.
(c) It must be universal.
(d) It must be beneficial to the species.

Short Answer Questions

1. What type of selection primarily affects the reproductive characteristics of a species?

2. What can be said about the range of species that are closely related?

3. What may hinder positive traits from being passed on during natural selection?

4. What type of relationship do organisms have with one another?

5. What types of species forms are NOT found in nature?

(see the answer key)

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