Pre-Dinosaur Evolution

Question 1

Q: Which group diversified and became dominant before dinosaurs?

Answer 1

A: Synapsids, such as Dimetrodon and Dicynodonts.

Question 1

Q: How many years passed between the first tetrapods and the first dinosaurs?

Answer 1

A: Approximately 120 million years.

Question 2

Q: What were some dominant synapsids during the Permian?

Answer 2

A:

Gorgonopsids (large carnivores).
Dicynodonts (dominant herbivores).
Cynodonts (mammal-like synapsids).