Question

what is osmosis?
the passive movement of molecules across a cell membrane from a higher concentration to a lower concentration with the help of a transport molecule
the movement of water molecules from a solution with a low concentration of water to a solution with a high concentration of water across a semipermeable membrane
the state of balance among all the body systems needed for the body to survive and function correctly
the movement of water molecules from a solution with a high concentration of water to a solution with

Explanation:

Osmosis is specifically about the movement of water molecules. It occurs across a semi - permeable membrane. The direction is from a region with a higher concentration of water (dilute solution) to a region with a lower concentration of water (concentrated solution).

• The first option describes facilitated diffusion (not osmosis) as it mentions molecules (not just water) and a transport molecule.
• The second option has the wrong direction of water movement.
• The third option describes homeostasis, not osmosis.

Answer:

The movement of water molecules from a solution with a high concentration of water to a solution with a low concentration of water across a semi - permeable membrane.