Question

''No specific excretory organs are present in unicellular organisms''. Hence , the main excretion takes place by:
A) simple diffusion through body surface B) through contractor vacuoles
C) osmosis through body surface
D) all the above​

Answer 1

Answer:

A is the answer of this question

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Answer 2

Main excretion in unicellular organisms is by simple diffusion through body surface. (option A)

• Excretion is the biological process of removal of wastes from the body. Different organisms have different structures or organs for excretion.
• Unicellular organisms excrete waste mainly by the process of simple diffusion through their body surface. Diffusion is the process of movement of substances from a region of higher concentration to a region of lower concentration.