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प्रश्न
Differentiate between microsporogenesis and megasporogenesis.
उत्तर
| Microsporogenesis | Megasporogenesis | |
| 1. | Microsporogenesis is the process of forming and differentiating pollen grains from microspore mother cells by meiosis. | The process of the formation and differentiation of megaspores from megaspore mother cells by meiosis is known as megasporogenesis. |
| 2. | Pollen grains are produced in the anther, which is a broader knob-like fertile part of the stamen. | Ovules (which are future seeds) are formed in the ovary. |
| 3. | All four pollen grains that are formed from the microspore mother cell are functional. | Only one out of the four megaspores is functional. |
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संबंधित प्रश्न
Where exactly is the filiform apparatus present in the embryo sac of an angiosperm? States its function.
Among the terms listed below, those that of are not technically correct names for a floral whorl are:
- Androecium
- Carpel
- Corolla
- Sepal
In a fertilised embryo sac, the haploid, diploid, and triploid structures are ______.
In an embryo sac, the cells that degenerate after fertilisation are ______.
Ovules are attached to a parenchymatous cushion called ______.
Polygonum type of embryo sac/typical female gametophyte of angiosperms is ______.
Embryo sac is called monosporic when it develops from ______.
Functional megaspore in an angiosperm develops into ______.
Nucellus embryo is ______.
What is the function of filiform apparatus in an angiospermic embryo sac?
Embryo sac → Nucellus → Integuments, is the correct sequence of parts in the ovule of an angiosperms.
Mark the odd one.
In the figure of anatropous ovule given below, choose the correct option for the characteristic distribution of cells within the typical embryo sac
| Number of cells at the chalazal end | Number of cells at micropylar end | Number of nuclei left in the central cell | |
| A | 3 | 2 | 3 |
| B | 3 | 3 | 2 |
| C | 2 | 3 | 3 |
| D | 2 | 2 | 4 |
Filiform apparatus is a highly thickened structure commonly present in ______.
Megaspores are produced from the megaspore mother cells after ______.
Name the parts of pistil which develop into fruit and seeds.
Identify the type of carpel with the help of diagrams given below:
