Question

Assertion (A): The embryo with 8 to 16 blastomeres is called a morula.
Reason (R): The morula continues to divide and transform into trophoblast.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false, but Reason (R) is true.

Hint:

The morula is a solid ball of cells formed after the early divisions of a fertilized egg. It transforms into the trophoblast during later stages of development.

Answer 1

The Correct Option is A

Step 1: Understanding the assertion.
The embryo with 8 to 16 blastomeres is indeed called a morula. This stage follows after the fertilized egg divides multiple times and forms a solid ball of cells.

Step 2: Verifying the reason.
The reason given is also correct. After the morula forms, it continues to divide and transforms into the trophoblast, which is essential for the implantation of the embryo in the uterine wall.

Step 3: Conclusion.
Both the assertion and reason are true, and the reason correctly explains the assertion. Therefore, the correct answer is (A).
Final Answer: (A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).