Question

In most of the mammals the testes are situated outside the abdominal cavity because

• A. Sperms produced in scrotal sac are more in number
• B. Sperms produced in abdominal cavity are provided with less motility
• C. Sperms produced in scrotal sac require lesser temperature for their best fertilization capacity
• D. Sperms produced in scrotal sac are bigger

Answer 1

The correct option is C Sperms produced in scrotal sac require lesser temperature for their best fertilization capacity

Testes in mammals are present out side the abdominal cavity because maturation of sperm needs low temperature. The temperature of scrotum is (2 to 4${}^{o}C$) lower than the body temperature.