Question

the movement of oxygen molecules over time from one side of the semipermeable membrane to the other side is known as
a osmosis.
b diffusion.
c plasmolysis.
d active transport.

Explanation:

• Osmosis is the movement of water molecules across a semi - permeable membrane.
• Diffusion is the movement of molecules (like oxygen) from an area of higher concentration to an area of lower concentration.
• Plasmolysis is the shrinking of the protoplasm of a plant cell due to water loss.
• Active transport requires energy (usually in the form of ATP) to move molecules against a concentration gradient.

In the given scenario, oxygen molecules are moving across a semi - permeable membrane from an area of higher concentration to an area of lower concentration. This is the definition of diffusion.

Answer:

B. diffusion