Answer: A
Explanation: There is no need to conduct and experiment if you already know the answer
Answer:
65% of oxygen
Explanation:
To name a few: Oxygen-65%, Carbon-18%, Hydrogen-10%
Answer:
Embedded in the lipid bilayer are large proteins, many of which transport ions and water-soluble molecules across the membrane. Some proteins in the plasma membrane form open pores, called membrane channels, which allow the free diffusion of ions into and out of the cell.
