Your assignment in biology lab is to design an experiment that would detect whether the enzyme pepsin is breaking down a protein. In the human body, pepsin works in the stomach. Which of the following experimental designs would be your best choice?

answer; hypnagogic sensations)

currents is the correct answer.

the fossil record provides evidence of a common ancestor to many species.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.