In apomixis, an embryo is created from a diploid cell in the:
Correct answer: C. Ovule
- A. Pollen tube
- B. Leaf
- C. Ovule
- D. All of the choices are correct
Explanation
Apomixis is a form of asexual reproduction in plants where embryos are formed without the process of fertilization. In apomixis, an embryo develops from a diploid cell within the ovule, usually without the involvement of meiosis or the fusion of male and female gametes. In normal sexual reproduction, the female gamete (egg cell) is fertilized by the male gamete (sperm cell) to form a diploid zygote. However, in apomixis, a diploid cell within the ovule undergoes a series of divisions to directly give rise to an embryo, without fertilization.
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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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