O Levels Biology (5090)•5090/11/O/N/24
Explanation
Sperm's Path to Fertilization
Steps:
- Sperm travel from testes through sperm duct to urethra for ejaculation.
- Upon ejaculation, sperm enter vagina.
- Sperm move through cervix into uterus.
- Sperm reach oviduct for egg fertilization.
Why A is correct:
- Sequence follows male (sperm duct, urethra) to female (vagina, cervix, uterus, oviduct) anatomy, where oviduct is the fertilization site per reproductive biology.
Why the others are wrong:
- B: Begins in uterus, reversing the entry path from male to female tract.
- C: Places urethra before sperm duct and skips vagina before uterus, violating ejaculation sequence.
- D: Mirrors C's errors with urethra before sperm duct and no vagina entry.
Final answer: A
Topic: Sexual reproduction in humans
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