1. Takes place when sex cells of two parent animals unite to new form a new organism.
2. Another term for sex cells
3. Fertilization that happens when sperm cells are released into the body of the
female animal.
4. An example of an animal that undergoes external fertilization.
5. The sex cell of a male animal.

3.Internal fertilization is the union of an egg and sperm cell during sexual reproduction inside the female body. Internal fertilization, unlike its counterpart, external fertilization, brings more control to the female with reproduction

4.Birds, fish, amphibians, reptiles, insects, coral, sea anemonoes, other related reef creatures such as the sea fan and the sea feather, shellfish, and platypus etc.. undergoes external fertilization.

5.sperm