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High School Biology: Mammals and Animal Behavior - Evolution and Classification of Mammals (Fill in the blank)
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High School Biology: Mammals and Animal Behavior - Evolution and Classification of Mammals (Fill in the blank)
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8 Questions

1. Cynodonts probably gave rise to mammals about ____________ million years ago.

2. Cynodonts had the ability to regulate body ____________.

3. Ancestors of mammals were amniotes called ____________.

4. ____________ evolved a number of mammalian traits, such as legs positioned under the body instead of along the sides.

5. ____________ mammals, being the most complex, were probably the last group of mammals to evolve.

6. Cynodonts had a good sense of ____________, which was more useful than good vision when hunting in the dark.

7. Ancestors of mammals evolved close to ____________ million years ago.

8. Pelycosaurs were the most common land vertebrates during the first half of the ____________ Period.

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