Question
Mention their source and the function they perform:
hCG, LH, FSH, Relaxin.
hCG, LH, FSH, Relaxin.
✓
Answer
| S. No. | Hormone | Source | Function |
| (i) | FSH | Anterior pituitary lobe. | Stimulates growth of ovarian follicles and maturation of primary oocytes. |
| (ii) | LH | Anterior pituitary lobe. | Induces ovulation and maintains corpus luteum. |
| (iii) | hCG | Chorionic cells of placenta. | Maintains the corpus luteum and stimulates it to secrete progesterone. |
| (iv) | Relaxin | Ovary. | Helps during child birth by relaxing the pelvic muscles as well as muscles of the cervix. |
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Apomixis is a mode of reproduction which does not involve formation of zygote through gametic fusion. In plants, apomixis commonly mimics sexual reproduction but produces seeds without fertilization. There are several methods of atomistic development in seeds. Thee two common ones are recurrent agamospermy and advective embryony.
Apomixis is a mode of reproduction which does not involve formation of zygote through gametic fusion. In plants, apomixis commonly mimics sexual reproduction but produces seeds without fertilization. There are several methods of atomistic development in seeds. Thee two common ones are recurrent agamospermy and advective embryony.
- Apomixis is a type of reproduction in plants, in which?
- Fertilization does not take place.
- Male nucleus takes part in fertilization.
- Pollen fusion takes place.
- Generative nucleus takes part in fertilization.
- Which of the following statements is incorrect regarding recurrent agamospermy?
- It is the formation of seed that has an embryo formed without meiosis and syngamy.
- All the cells of embryo sac are diploid.
- An embryo develops directly from a diploid cell other than egg like that of nucleus and integument.
- None of these.
- Adventive embryony is found in:
- Citrus.
- Opuntia.
- Apple.
- Both (a) and (b).
- Formation of embryo directly from diploid egg without fertilization is called:
- Apospory.
- Diplospory.
- Polyembryony.
- Diploid parthenogenesis.
- If any somatic cell of sporophyte produces gametophyte without reduction division, it is called:
- Parthenogenesis.
- Apogamy.
- Apospory.
- Amphimixis.