Catalysts affect the chemical reactions that take place within the body. what function do catalysts perform in chemical reactions?

Which of th following is needed for cellular respiration to occur

One student group hypothesized that the dry baker's yeast must be alive. the temperature change, odor, and bubble foation, they said, indicated whych characteristic of life

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. earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea. c. the mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency. d. planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originated.