What land changes happen during the Permain period?

What biological changes happened during the Permian period?

Why happened to marine life in this period?

Why do we believe this extinction occurred?

How was this extinction beneficial?

What are temporal openings? Why are they important?

what are the 4 types of temporal openings?

Why are holes in the skull beneficial?

describe the Triassic period in the Mesozoid era.
(2 things)

Describe the Jurassic period in the Mesozoic Era.
(2 things)

Describe the Cretaceous period in the Mesozoic era.
(2 things)

What did he cretaceous extinction effect? What did it not effect?