A single celled organism such as the amoeba used its cell membrane organelle to take in oxygen and remove carbon dioxide. Which organ system in humans has the same functions as the cell membrane of the amoeba A. Digestive
B. Nervous
C. Circulatory
D. Respiratory

~~16. while watching a special on animals, brianna discovers that hares tend to lose heat through their ears. based on this and what is known about surface-to-volume ratios, propose an explanation as to why hares that live in hot climates (such as the desert) have large, extended ears

Which of the following is required of a new drug?me

What are positive impacts of algae? how is it used?