Question 3 — Assertion (A): The zygote formed - Questions at the end of the chapter - Chapter 11 - Reproduction: How Life Continues (Exploration)

Last updated at July 3, 2026 by

Question 3
Assertion (A): The zygote formed after fertilisation immediately attaches to the uterus wall. Reason (R): The uterus wall is always prepared to receive the zygote. (i) Both A and R are true, and R is the correct explanation of A. (ii) Both A and R are true, but R is not the correct explanation of A. (iii) A is true, but R is false. (iv) A is false, but R is true.
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Answer: (iv) A is false, but R is (treated as) true

  • A is false: the zygote does not attach immediately — it undergoes mitotic divisions while travelling to the uterus and only then implants.
  • The uterine lining is prepared to receive a zygote (though it is prepared cyclically, not literally “always”), so R is taken as the true statement; since A is false, option (iv) fits best.
Assertion-Reason Zygote divides while moving to the uterus It implants only after reaching the uterus So A is false → answer (iv)
Back to: 11.5.6 What happens when an egg is not fertilised?
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