Internal respiration may be defined as: (a) breathing in and releasing of oxygen in the tissue (b) the oxidation of food substances to release energy (c) the building up (synthesis) of complex substances (d) getting rid of carbon dioxide that would accumulate in the tissues.
BiologyClass 10ICSEAnswered 27 Mar 2026
Answer
(b) The oxidation of food substances to release energy
Internal respiration may be defined as the oxidation of food substances to release energy.
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