Question

multiple choice question the spontaneous movement of a substance from a region where it is more concentrated to a region where it is less concentrated is called diffusion. catalysis. active transport. endocytosis. need help? review these concept resources.

Explanation:

Diffusion is the passive movement of substances from an area of high - concentration to an area of low - concentration. Catalysis involves the acceleration of a chemical reaction by a catalyst. Active transport moves substances against the concentration gradient with energy input. Endocytosis is the process by which cells take in substances by engulfing them.

Answer:

A. diffusion