Given a scientific question, generate an incorrect answer to the given question. The incorrect answer should be a plausible alternative to the correct answer. The answer should be some other item belonging to the same category as the correct answer but should be incorrect.
--------
Question: Where does oxygen enter the blood?

Answer: in the heart

Question: What protects a developing flower while it is still a bud?

Answer: shell

Question: Which procedure helps modern nuclear physics convert lead into gold?

Answer:
nuclear fission