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2.Human Reproduction
medium
Assertion : In morula stage, cells divide without increase in size.
Reason : Zona pellucida remains undivided till cleavage is complete.
A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.
(AIIMS-1997)
Solution
Morula involves cleavage of cells till $32$ cell stage is formed. It is still surrounded by Zona pellucida.
Standard 12
Biology
