The main embryo develops from the structure formed as a result of fusion of:
Correct answer: C. Egg cell and male gamete
- A. 2 polar nuclei of embryo sac
- B. Definitive nucleus and male gamete
- C. Egg cell and male gamete
- D. Male gamete and synergids
Explanation
The main embryo in flowering plants (angiosperms) develops from the structure formed as a result of the fusion of the sperm cell with the egg cell. This fusion, known as syngamy, occurs within the embryo sac, which is located within the ovule. When the sperm cell fertilizes the egg cell, it forms a zygote. The zygote then undergoes mitotic divisions and develops into the main embryo of the seed. This embryo eventually matures into the sporophyte plant when the seed germinates.
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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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