Caecilians have no legs. Neither do snakes or whales. Why then do we call them tetrapods? (Hint: Consider their evolutionary histories)

Pepsin is an enzyme in the stomach that breaks polypeptides into amino acids. pepsin functions best at a ph of around 1.5. what would be the most likely result if the ph of the stomach were increased to 5

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an

What type of weather does tropical continental air bring in summer? hot and cloudy cool and sunny hot and sunny cool and cloudy