Viviparous animals are those in which?
Correct answer: D. Internal fertilization with internal development inside female body
- A. Internal fertilization with external development in eggs
- B. Internal fertilization and internal development followed by hatching of egg
- C. External fertilization with external development
- D. Internal fertilization with internal development inside female body
Explanation
Viviparous animals are those that have sexual intercourse due to which the sperm and egg cell fuse and form an embryo in the female body. This allows internal fertilisation and development of the embryo. Once the gestation period is over, the female gives birth to that fetus.
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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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