Implantation involves ________

A) formation of germ layers
B) placenta completion
C) embedding of the blastocyst in the uterine wall
D) fusion of egg and sperm


C
Explanation:
A) The germ layers form after implantation.
B) The placenta does not begin to form until after implantation.
D) Fertilization is the fusion of the egg and sperm.

Anatomy & Physiology

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