Which best describes the function of enzymes in the body? A. Enzymes act as catalysts to speed up and drive chemical reactions forward, B. Enzymes act as substrates when the necessary proteins are unavailable.
C. Enzymes are changed during a reaction.
D. Enzymes act as a product to create new chemical reactions.​

12) several teeth were found in an area of flat land covered with trees and plants. the teeth were examined by a paleontologist, and it was determined that the teeth came from a shark. they found many other shark teeth in this area. however, the people who discovered the teeth were puzzled, because there was no source of water near where the fossils were found. what is the paleontologist's best explanation for why the teeth were found in this area? a) sharks used to live on flat land. b) this area was once covered with salt water. c) this area was once covered with freshwater. d) someone buried the shark teeth deep in the ground.