___ 1. Takes place when sex cells of two parent animals
___ 2. Another term for sex cells.
___3. Fertilization that happen when sperm cells are released into the body of the female animal
___4. Animals that undergo external fertilization.
___ 5. The sex cells of male animal.
___6. The sex cells of the female animal.
___ 7. Another term for fertilized egg
___ 8. Fertilization that takes place when the union of the sex cells happens outside the body.
___ 9.This animal reproduce through budding.
___ 10. These animals have estrous cycle examples are rats, dogs, and cows.

a. sperm cell
b. egg cell
c. zygote
d. gametes
e. frogs
f. external fertilization
g. Internal fertilization
h. fertilization
i. mammals.
J. butterfly
k. jellyfish