Question

multiple choice question
the head of the sperm cells is covered by the ____, which contains digestive enzymes to help penetrate the ovum.

zona pellucida

flagellum

corona radiata

acrosome

Explanation:

The acrosome is a cap - like structure on the head of sperm cells. It contains digestive enzymes (such as hyaluronidase and acrosin). These enzymes are crucial for the sperm to penetrate the corona radiata (outer layer of follicle cells around the ovum) and the zona pellucida (glycoprotein layer around the oocyte). The flagellum is the tail of the sperm for motility. The corona radiata is part of the egg's protective layers, and the zona pellucida is another protective layer of the ovum, not a structure on the sperm.

Answer:

acrosome