Multiple choice

The common process of excretion in unicellular plants and animals is _______.

  1. osmosis

  2. diffusion

  3. plasmolysis

  4. imbibition
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Unicellular organisms rely on simple physical processes to exchange materials with their environment. Diffusion allows gases and small molecules to move across the cell membrane along a concentration gradient.

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