n. Direction: Write T if the sentence is true and F if it is false. - 16. When the egg cell unites with the sperm cell the process is called fertilization. - 17. Some animals have both the testes and the ovaries. - 18. A kind of fish called Salmon, spawn in salt water. 19. Internal fertilization occurs within the body of the female. - 20. Frogs undergo internal fertilization.-​