B. ATP is hydrolyzed and turns into ADP
ATP --> ADP + P = HYDROLYSIS
ADP + P --> ATP = PHOSPHORYLATION
The respiratory system regulates oxygen flow, and provides regulation for oxygen blood content. Circulatory system plays a roll in providing enough oxygenated blood to the body
The second question has the answer of A
True. It also states that they cannot compete for the same resources.<span />