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 becomes a blastocyst (with trophoblast as its outer layer), so the reason is false.

Answer 1

The Correct Option is C

Step 1: Check the Assertion
After repeated cleavage the embryo with 8 to 16 blastomeres is called a morula. So (A) is true.

Step 2: Check the Reason
The morula keeps dividing and changes into a blastocyst. The trophoblast is only the outer layer of cells of the blastocyst. It is not what the whole morula transforms into, so (R) is false.

Step 3: Choose the option
A is true and R is false, which is option (C).

Final Answer:
Option (C): Assertion (A) is true, but Reason (R) is false.