Flowering plants evolved about a. 600 million years ago c. 300 million years ago b. 420 million years ago d. 120 million years ago

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

Name one similarity and one difference between the morphology of a brachiopod and a bivalve

What two factors does carrying capacity compare? population size and resource use population growth and resource availability resource use and time population size and time