Question

Observe the given diagram and answer the following question. Which of the following is not the ancestor of Mammals?

• A. Early reptiles
• B. Synapsids
• C. Thecodonts
• D. Therapsids

Answer 1

The correct option is C Thecodonts

Evolution of mammals
Early Reptiles $\to$ Synapsids $\to$ Pelycosaurs $\to$ Therapsids $\to$ Mammals

Evolution of most Reptiles
Early Reptiles $\to$ Sauropsids $\to$ Turtles, Lizards, Snakes, Tautaras

Evolution of Crocodiles, Dinosaurs and Birds
Early Reptiles $\to$ Sauropsids $\to$ Thecodonts $\to$ Crocodiles, Dinosaurs and Birds