An egg cell and sperm cell join together to form a _____.
(1 point)
Responses
zygote
zygote
placenta
placenta
blastocyst
blastocyst
fetus
zygote
A week after fertilization, a blastocyst attaches to the lining of the _____.
(1 point)
Responses
ovaries
ovaries
uterus
uterus
fallopian tubes
fallopian tubes
ovum