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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 8: Hybridism.

Multiple Choice Questions

1. What is the struggle for existence caused by?
(a) Natural selection.
(b) Quick reproduction.
(c) Too many species.
(d) Little food sources.

2. What results as a climate becomes more hostile?
(a) Better cooperation between species.
(b) Fewer species.
(c) Less food.
(d) More competition.

3. Why do hybrids tend to display little variation?
(a) The parents are the same.
(b) The parents are very close in characteristics.
(c) There is no natural selection with hybrids.
(d) Because of genetic defects.

4. Why does the point of possible starvation for animals occur sooner than for humans?
(a) Humans can rely on dietary supplements.
(b) Humans have better hunting tools.
(c) Humans can last longer on less food.
(d) Humans artificially produce food.

5. How do some scientists demonstrate the differences between species and variations?
(a) Through hybrids.
(b) Fossil records.
(c) Natural breeding.
(d) Scientific method.

Short Answer Questions

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

2. If the pistils of a flower are very long, what type of reproduction limitation may this result in?

3. What happens when two species from different climates interbreed?

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

5. What type of populations experience more variations?

(see the answer key)

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