I don’t know if this is a question but yes a controlled experiment allows you to isolate and test the hypothesis
Mutation causes change in an organisms DNA, resulting in a change in all aspects of the organisms life. It affects how the organism looks, and how it behaves. If there was no mutation, an organism could not change, therefore there wouldn't be evolution at all.
Answer:
ice
Explanation:
so it freezes it to preserve it
Answer:
I believe the answer is B. X-spongy;Y-marrow
Answer: When a blood vessel contracts for a short period of time.This constriction can contract small vessels completely and avoid the flow of blood through them.
Explanation: