16. The developed zygote is called
a. embryo b.gametes
17. Which animal undergoes external ferti
a.cat
b. COW
18. The following statements describe se
a. The ovary produces egg cells.
b. No sex cell is needed to form
c. Sex cells from male and femal
d. The embryo is soon develope
19. Which best defines internal fertiliza
a. Both sex cells are released ir
b. It is the initial phase in the se
The fertilized egg is nourishi​