Question

Which of these is the correct evolutionary line of mammals?

• A. Sauropsids $ \rightarrow $ Synapsids $ \rightarrow $ Therapsids $ \rightarrow $ Mammals
• B. Synapsids $ \rightarrow $ Sauropsids $ \rightarrow $ Therapsids $ \rightarrow $ Mammals
• C. Sauropsids $ \rightarrow $ Therapsids $ \rightarrow $ Mammals
• D. Synapsids $ \rightarrow $ Therapsids $ \rightarrow $ Mammals

Answer 1

Answer: (D)

A common ancestor which is a now extinct reptile gave rise to two groups: Sauropsids which evolved to form many ancestors and Synapsids which give rise to Therapsids. They were ancestors of modern day mammals.