Question

When did the Mesozoic era began and end

Answer 1

The Mesozoic era began in 65 and it end on 251

Step-by-step explanation:

Answer 2

Began: 251.902 (+/- 0.24) million years ago

Ended: 65 million years ago

Step-by-step explanation:

Began: 251.902 (+/- 0.24) million years ago

Ended: 65 million years ago

The answer is above.

Hope this helps.