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Kriti
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Asked: 2026-10-14T05:54:58+00:00 In:

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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The correct option is (iv) A is false, but R is true. The zygote undergoes several mitotic divisions while traveling through the oviduct before implanting; it does not attach immediately.

Chapter 11 Reproduction How Life Continues Solutions
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    1. The correct option is (iv) A is false, but R is true. Assertion A is false because the newly formed zygote divides mitotically into a multicellular embryo while moving down the fallopian tube over several days before implanting. Reason R is true because during every normal menstrual cycle, the uterine lining thickens and enriches with blood vessels to receive a fertilized egg.

       

      For more NCERT Solutions of Class 9 Science Exploration Chapter 11 Reproduction How Life Continues Question Answer (2026-27)

      https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-11/

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