Answer:
The answer is Nucleic acid. Your body uses carbohydrates, lipids and proteins for energy. The only biological macromolecule not used for energy is nucleic acid.
Explanation:
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I have no idea
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Answer:
The arteries
Explanation:
The arteries (red) carry oxygen and nutrients away from your heart, to your body's tissues. The veins (blue) take oxygen-poor blood back to the heart. Arteries begin with the aorta, the large artery leaving the heart. This carries the oxygen away from the heart.
An organelle found in large numbers in most cells