Question

what is respiration ?​

Answer 1

Answer:

a process by which living things produce energy from food. Respiration usually needs oxygen

Answer 2

Answer:

Respiration is a chemical reaction that happens in all living cells, including plant cells and animal cells. It is the way that energy is released from glucose so that all the other chemical processes needed for life can happen. Do not confuse respiration with breathing (which is properly called ventilation).

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