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Question

In many unicellular organisms, waste products are removed by the process of ___________.


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Solution

Diffusion:

  1. Diffusion is the process of movement of particles from a region of higher concentration to a region of lower concentration.
  2. In lower animals, excretion occurs by this method.
  3. Example: In the case of Porifera, ammonia and carbon dioxide are removed by the process of diffusion.

Final answer: In many unicellular organisms, waste products are removed by the process of diffusion.


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