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2.Human Reproduction
medium
$A$ : In morula stage the cells divide without any increase in size.
$R$ : Zona pellucida remains intact till cleavage is completed.
A
Assertion and Reason both are correct and also correct explantion.
B
Assertion and Reason both are correct but not explanation of assertion.
C
Assertion is correct, but Reason is incorrect.
D
Both Assertion and Reason are incorrect.
Solution
There is marked increase in $DNA$ but no increase in mass of cytoplasm
Standard 12
Biology