Pollen tube contains:
Correct answer: B. Two male nuclei
- A. One male nucleus
- B. Two male nuclei
- C. Three male nuclei
- D. Four male nuclei
Explanation
This is the correct option. The pollen tube contains two male nuclei. One of these male nuclei fuses with the egg cell to form the zygote, and the other male nucleus fuses with the polar nuclei to form the triploid endosperm nucleus during double fertilization in flowering plants.
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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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