Pick your answer from:
--nerve cells;
--fiber;
--eggs;
--nucleus;

Answer the following question given this paragraph: The head of the sperm contains the nucleus. The nucleus holds the chromosomes. In humans, the nucleus of a sperm cell contains 23 chromosomes. The acrosome on the head contains enzymes that help the sperm penetrate an egg. Q: The head of the sperm contains what, which holds the chromosomes? A:
Answer:
nucleus