Final answer:
A sperm cell contains digestive enzymes in its head to allow it to penetrate an egg during fertilization.
Step-by-step explanation:
A sperm cell contains digestive enzymes in its head, specifically in the acrosome. The acrosome is a cap-like structure in the head of the sperm that contains these enzymes.
The enzymes are important for the sperm to penetrate and break down the outer layers of an egg during fertilization.