A Blastocyst is A(n)

Question

A blastocyst is a(n)
A)extra-embryonic membrane.
B)solid ball of cells.
C)hollow ball of cells.
D)portion of the placenta.
E)origin of the urinary bladder.

Accepted Answer

A blastocyst is a stage of development in embryos where the mass of cells has formed a hollow ball with an inner cell mass that will eventually become the embryo itself.