In humans the small intestine can be over 8 meters. why must this organ be so long?

What is the number of phosphates in an atp molecule

Environmental impacts on evolution : mastery test

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.