NEETZoologyHuman Reproduction
Select the correct option on the basis of the diagram below. Assertion (A): The morula stage follows the blastocyst stage in embryonic development. Reason (R): The blastocyst has a structure consisting of an outer trophoblast and an inner cell mass.
Options
- ABoth Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
- BBoth Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
- CAssertion (A) is true, but Reason (R) is false.
- DAssertion (A) is false, but Reason (R) is true.
Correct answer
D. Assertion (A) is false, but Reason (R) is true.
Step-by-step solution
Assertion (A) is false. The morula continues to divide and transforms into blastocyst as it moves further into the uterus. Reason (R) is true. The blastomeres in the blastocyst are arranged into an outer layer called trophoblast and an inner group of cells attached to trophoblast called the inner cell mass.