What begins as a single-cell structure that is created when a sperm & egg merge at conception?
a. embryo
b. fetus
c. zygote
d. infant
Answer: c. zygote
What begins as a single-cell structure that is created when a sperm & egg merge at conception?
a. embryo
b. fetus
c. zygote
d. infant
Answer: c. zygote