Question

multiple choice question
the first mammals were small and arose during the

o paleogene period.

o jurassic period.

o cambrian period.

o permian period.

Explanation:

The first mammals originated during the Jurassic period. They were small - sized creatures that co - existed with the dominant dinosaurs of that era. The Paleogene period came after the extinction of dinosaurs and saw the diversification of mammals. The Cambrian period is known for the Cambrian explosion of diverse life forms but no mammals. The Permian period predates the appearance of mammals by a long time.

Answer:

B. Jurassic period