<span>The O Blood Which Is Also Called A Universal Donor
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Answer:
They speed up chemical reactions. Without them you wouldn't be alive. They break down macromolecules, and also lower the amount of energy needed for a chemical reaction to happen.
im not positive but i think in the chemical bonds of molicules but id check google first
Answer:
first one is chromosome and second one is double helix
Explanation:
idek if that's what your asking lol hope you do good
