NEET Zoology Pregnancy Assertion Reason Question
Assertion (A): The implantation of the blastocyst in the uterus is the event that marks the beginning of pregnancy. | Reason (R): The trophoblast layer of the blastocyst attaches to the endometrium, leading to rapid division of uterine cells that embed the blastocyst.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Correct Answer
Detailed Explanation
The NCERT context specifies that implantation happens when the trophoblast attaches to the endometrium, leading to pregnancy, explaining both the assertion and the reason.
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