Which type of epithelial tissue is best designed for gas exchange?

Why did leaders such as siddhartha gautama abandon hinduism to createbuddhism around 500 bce:

Abody of water that is surrounded by land on three sides and leads to a larger body of water is called

The permo-triassic extinction event had a greater impact on the number of earth's species than did the extinction event at the end of the cretaceous true false