Answer:
"Both begin with glycolysis. Both occur in mitochondria. Both require oxygen to proceed."
Explanation:
The answer is D. Proteins.
As enzymes are considered to be globular proteins, made up of amino acids linked together in one or more polypeptide chain, to which this as a whole is a protein.
Answer:
The inferior vena cava returns blood from the lower limbs to the heart.
Explanation: