Which of the following describes the main role of the electron transport chain in cellular respiration?
O A. It produces the energy carriers.
B. It produces molecules of ATP.
OC. It breaks down glucose molecules.
D. It pump's hydrogen ions inside the cell.

mendel's first law states that during the formation of reproductive cells , pairs of hereditary factors for a specific trait separate so that offspring receive one factor from each parent.

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".