Which of the following is an important concept in Darwin's theory of evolution by natural selection? A) descent with modification, B) homologous molecules, C) processes that change the surface of Earth, D) the tendency toward perfection

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy