Within each biome, how can the environment be organized into levels from complex to simple?

The model illustrates a process by which a substance is taken up by a cell

Does masterbation affect height growth or loss of growth hormone?

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