Question

Select the correct explanation for the labels A, B, C and D.

• A. A represents the fertilised zygote.
• B. B represents the stage of morula formation.
• C. C represents the blastocyst.
• D. D represents the blastocyst implantation.

Answer 1

The correct option is D D represents the blastocyst implantation.

In the given figure, A represents the fusion of male and female gametes, B is 4 celled blastomere. C shows the morula stage, i.e., an embryo with 8 blastomeres and D is the blastocyst which gets implanted in the uterus.