Answer:
D) It contains compounds and is therefore a substance
Explanation:
A mixture is composed of multiple compounds.
Answer:
Enzymes work by binding to reactant molecules and holding them in such a way that the chemical bond-breaking and bond-forming processes take place more readily. Basically, it reduces the activation energy and makes the reaction occur faster.
Because we have carbon in the ground in the air and every were else
I think the answer is A, i dont know for sure tho. But it's the only one that makes sense to me.
Sorry if it's wrong
Hope this helps!! :-)
