Two things needed for respiration to occur?

Answer 1

People normally think of respiration in terms of humans and breathing, it is important to note that it is one of the 7 characteristic processes shared by all living organisms, so it must have a universal definition: "processes leading to, and including the chemical breakdown (oxidation) of food materials to provide energy for life". In the process of respiration the living biengs inhale oxygen, and exhale carbondioxide.

Answer 2

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