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High School Biology Practice Test: Evolution (Fill in the blank)
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High School Biology Practice Test: Evolution (Fill in the blank)
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10 Questions

1. Structures that are similar because they were inherited from a common ancestor are called __________.

2. The shortest subdivisions of the geologic time scale are __________.

3. The unit of evolution is the __________.

4. The cell that gave rise to all subsequent life on Earth is called __________.

5. Organisms that can produce fertile offspring together belong to the same __________.

6. Dinosaurs went extinct at the end of the __________ Era.

7. Evolution that occurs within a relatively short period of time is termed __________.

8. The ultimate source of new genetic variation in a species is __________.

9. __________ refers to differences between males and females of the same species.

10. The evolution of cells with organelles is explained by __________ theory.

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