The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.
Explanation:
B) Molecules are moving from a higher concentration to a lower concentration
Water molecules from the more concentrated side, will flow into the less concentrated side til they equilibrate- at equilibrium both sides will have the same concentration of solute and water molecules.
In diffusion, small non-charged molecules can move from regions of high concentration to regions of low concentration. This occurs across the phospholipid bilayer, which acts as a semi-permeable membrane into the extracellular fluid or the cytoplasm which are both hydrophilic- this involves the movement of water molecules, gases or other small water-soluble compounds
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In osmosis, molecules of water move across a semi permeable membrane, from regions of high concentration to regions of low concentration until an equilibrium is reached. This always occurs along the concentration gradient within the system.
Learn more about membrane components at brainly.com/question/1971706
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Prokaryotes don't have a nucleus so it's bacteria :)
Precipitation is the correct answer
