Question

Which of these is the correct evolutionary line of mammals?

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