Answer:
The respiratory cycle converts NADH and FADH2 into reactants that the Krebs cycle requires to function. Thus, if oxygen is not present, the respiratory cycle cannot function, which shuts down the Krebs cycle. For this reason, the Krebs cycle is considered an aerobic pathway for energy production.
Explanation:
Answer:
A. movement of molecules across a semipermeable membrane against a concentration gradient with a protein
No I think because snails need to use water to breath.
Alveoli are found in lungs and exchamge O2 and Co2 !!
so answer is last one !!
Answer:
can not answer without the rest of the question
Explanation:
