Answer:
1. Ask him If he is a blood related twin.
2. Ask him where his twin was this whole time
3. Tell him he should ask himself if he done anything good to help the twin yet
Explanation:
B. Endocrine system. It is a collection of glands which produce hormones.
Answer:
A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process. Catalysts typically speed up a reaction by reducing the activation energy or changing the reaction mechanism. Enzymes are proteins that act as catalysts in biochemical reactions.