[Campbell Biology P.1068] Which of the following statements about fertilization methods is co... | Practice Question

Which of the following statements about fertilization methods is correct according to the provided information?

  • A: External fertilization primarily occurs in placental mammals, where the embryo develops internally.
  • B: Internal fertilization means an egg encounters sperm inside the female reproductive tract, and in most mammals, the embryo develops internally.
  • C: Hermaphroditism is a prerequisite for external fertilization.
  • D: All animals with separate sexes undergo external fertilization.

Explanation

The diagram states "External fertilization: An egg encounters sperm outside of the female reproductive tract." and "Internal fertilization: An egg encounters sperm inside the female reproductive tract. In some animals, including most mammals, the embryo develops internally and is born from the mother's body." Option B accurately combines these facts.