▶️ Answer/Explanation
The correct part is D, which represents the acrosome. The acrosome is a cap-like structure located at the very front of the sperm’s head. It contains specialized digestive enzymes, such as hyaluronidase and acrosin, which are essential for fertilization. These enzymes break down the protective outer layers of the egg cell (the corona radiata and zona pellucida), allowing the sperm to penetrate and deliver its genetic material.
For context: * A is the flagellum (tail) used for swimming. * B is the midpiece containing mitochondria for energy. * C is the nucleus containing the haploid set of chromosomes.
✅ Answer: (D)
▶️ Answer/Explanation
✅ Answer: (A)
▶️ Answer/Explanation
Sperm production, known as spermatogenesis, occurs specifically within the testes. Inside the testes are coiled structures called seminiferous tubules where germ cells divide and differentiate into mature spermatozoa. While the scrotum houses the testes to provide a cooler environment for development, it does not produce the sperm itself. The prostate gland contributes fluid to the semen, and the penis serves as the organ for delivery. Therefore, the physiological site of production is the testes.
✅ Answer: (D)