The pollen grain consists of:
Correct answer: D. All (A), (B) and (C)
- A. Exine part
- B. Intine part
- C. Tube nucleus and generative nucleus
- D. All (A), (B) and (C)
Explanation
The pollen grain's intine and exine collaboratively provide structural integrity and protection. Meanwhile, the tube nucleus and generative nucleus play pivotal roles in fertilization by facilitating pollen tube formation and generating sperm cells, respectively.
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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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