Which is a reactant in the cellular restoration reaction

Oxygen and glucose represent the reactants, while carbon dioxide, water, and energy represent the products. Reactants are the molecules that combine to start the reaction. Products are those molecules produced during cellular respiration.

Explanation:

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".