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Question

Explain exchange of gases and respiration in unicellular organisms [3 MARKS]

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Solution

Respiration: 1 Mark each
1. In unicellular animals, such as amoeba, exchange of gases takes place through cell surface.
2. They absorb oxygen from the surrounding air or water and give out carbon dioxide through plasma membrane by diffusion.
3. The cells use the oxygen absorbed for cellular respiration and derive energy.


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