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2.Human Reproduction
normal
$A$ : Blastocyst undergoes gastrulation to produce the three germinal layers.
$R$ : This involves cell movements (morphogenetic movement) that eventually help to attain new shape and morphology of embryo
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
Morphogenetic movements involve epiboly, emboly, involution, invagination and delamination. Delamination is chief in humans.
Standard 12
Biology
