Lighting a match and baking a cake are two actions that involve chemical changes. why are these actions considered chemical changes? select one: a. they change the state of matter. b. they create new substances. c. they change volume. d. they create energy.

Cells a and b are the same size and shape, but cell a is metabolically quiet and cell b is actively consuming oxygen. oxygen will diffuse more quickly into cell because . b the oxygen molecules inside cell b have a higher kinetic energy b. a its membrane transport proteins will not be saturated c. a the diffusion gradient there is shallowerd. b the diffusion gradient there is steeper