In the Section "Investigating Life: Sniffing Out the Origin of Feathers",large

question 31

Multiple Choice

In the section "Investigating Life: Sniffing Out the Origin of Feathers",large nasal cavities were found in therapsids,extinct reptiles thought to be ancestors of mammals.What did the scientists conclude from this observation?

• A)Endothermy arose after fur.
• B)Ectothermy arose before fur.
• C)Endothermy arose before fur.
• D)Ectothermy arose after fur.
• E)Birds did not descend from reptiles.

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