How do cells with the same set of DNA become a wide variety of specialized cells?

Why is excretion necessary to maintain homeostasis?

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

Look at the photo of the leaf. which term best describes this leaf?