Question

A blastocyst is a

A.)cluster of cells surrounding a developing egg in the uterus.
B.)growth that can form in the wall of the fallopian tubes.
C.)hollow ball of cells formed after a fertilized cell undergoes cell division.
D.)membrane that surrounds and protects a growing embryo in the uterus.

Answer 1

http://en.wikipedia.org/wiki/Blastocyst

Answer 2

thanks i found it (:

Answer 3

and what's your answer?

Answer 4

d i think?