What is plant respiration in simple terms? (cellular respiration)

Cellular respiration is the process of breaking sugar down into a form that the cell can utilize as energy.

Explanation:

This happens in all types of life. Cellular respiration takes in food and uses it to produce ATP, a chemical which the cell uses for energy. Typically, this process uses oxygen and is known as aerobic respiration.

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in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".