Which is correct?
Correct answer: A. Gametes are invariably haploid
- A. Gametes are invariably haploid
- B. Spores are invariably haploid
- C. Gametes are generally haploid
- D. Both spores and gametes are invariably haploid
Explanation
Gametes are invariably haploid. Spores are formed in lower plants by mitotic division and they may be diploid but gametes are always be made by meiosis and they are always haploid.
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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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