The answer is C genetic variation
<span>No they don't,they have to work together for an organ to function.</span>
Answer:
like david said just wash it lol
Explanation:
Facilitated diffusion is the diffusion of solutes through transport proteins in the plasma membrane. Facilitated diffusion is a type of passive transport. Even though facilitated diffusion involves transport proteins, it is still passive transport because the solute is moving down the concentration gradient.
