How to do this? They said my question has to be at least 20 whatever long so this is yea

Consider the activity and specificity of the three enzymes. pepsin is most active in the human and to digest

Which muscle cell structure stores calcium ions that are used to trigger the contraction?

Select the correct answer. which of the following statements is a scientific claim? a. the early solar system had large amounts of water; so, the oldest objects in the solar system should also be abundant in water. b. the mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency. c. planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originated. d. earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea.