Given a scientific question, generate a correct answer to it.

Input: Consider Input: Blood flows into the kidney through which artery?

Output: renal artery

Input: Consider Input: After fertilization is complete, no other sperm can enter. the fertilized ovule forms the seed, whereas the tissues of the ovary become this?

Output: fruit

Input: Consider Input: What can be hard or even impossible to perform in a scientific sense?
Output: experiments