Question

1. diffusion of water across a cells plasma membrane is called

a. cytokinesis.
b. mitosis.
c. osmosis.
d. meiosis.

Explanation:

• Option a: Cytokinesis is the division of the cytoplasm during cell division, not related to water diffusion.
• Option b: Mitosis is the process of cell division (nuclear division), not about water movement.
• Option c: Osmosis is defined as the diffusion of water across a selectively permeable membrane (like a cell's plasma membrane) from an area of higher water potential to lower water potential.
• Option d: Meiosis is a type of cell division for gamete production, not related to water diffusion.

Answer:

c. Osmosis