1. A blastocyst is a(n)
A) hollow ball of cells
B) solid ball of cells
C) origin of the urinary bladder
D) extraembryonic membrane
E) portion of the placenta
2. During amphimixis
A) the ovum finishes meiosis II.
B) meiosis occurs.
C) sperm become capacitated
D) the male and female pronuclei fuse
E) gametes are formed