Q1. [1] medium thorough-understanding
[mcq] Sperms are produced in the testes, which are located in scrotal sacs outside the abdominal cavity. Which of the following correctly explains this structural arrangement?
(A) The scrotal sacs protect the testes from mechanical injury during movement.
(B) Sperm production requires a temperature slightly lower than normal body temperature.
(C) The scrotal position allows sperms to be released directly into the urethra without travelling far.
(D) The testes need a rich blood supply that is only available outside the abdomen.
- A Sperm formation needs a lower temperature than body temperature; the tail provides motility to reach the female germ-cell.
- B Sperm formation needs a lower temperature than body temperature; the tail stores the genetic material needed for fertilisation.
- C Sperm formation needs a higher temperature than body temperature; the tail provides motility to reach the female germ-cell.
- D The testes must be outside to allow easy release of sperms; the tail helps the sperm penetrate the egg wall.
Generated by claude-sonnet-4-6 · 2026-06-26 01:08 · grounding rag
Model Answer
(B) Sperm formation needs a lower temperature than body temperature; the tail provides motility to reach the female germ-cell.
Explanation
The passage explicitly states: "sperm formation requires a lower temperature than the normal body temperature" — this explains why testes are in the scrotum. The passage also states the sperm has "a long tail that helps them to move towards the female germ-cell." Option A is wrong because it wrongly says the tail stores genetic material (that is the head's function). Options C and D contradict the textbook.