In viviparous animals:
Correct answer: B. Internal fertilization leading to embryo formation
- A. External fertilization leading to embryo formation
- B. Internal fertilization leading to embryo formation
- C. External development leading to embryo formation
- D. None of the above
Explanation
Viviparous animals give birth to their children as the embryo is formed within the mother's body and continues to grow there. They receive direct nourishment from the mothers' placenta.
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Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
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