Concentration gradient across the membrane. Proteins in the membrane allow specific molecules through, passively.
All living organisms need to take substances from their environment to obtain energy, to grow and to stay healthy
Unconformities occur when erosion wears away rock, or when rock deposits are never formed hope this helps :3
Answer:
its the vascular system
Explanation:i know beacuse and my name is coden btw
Answer:
No
Explanation:
In every action you make you use energy, when you sleep you still have to breathe and regulate tempetaure. If you stopped giving energy to your cells as you sleep you not be able to breathe.
