Both animals and plants must maintain homeostasis in order to stay alive. Plants excrete water and oxygen through the stomata (tiny holes in the leaves) as waste products of
photosynthesis, which system in the human body would this be comparable to?
a. Nervous system
b. Circulatory system
c. Reproductive system
d. Excretory system

B

Explanation:

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

it is either c or d and i know for sure it is not a or b