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प्रश्न
Describe the structure of female gametophyte of angiosperms.
थोडक्यात उत्तर
उत्तर
- In angiosperms, female gametophyte present in the ovule is haploid embryo-sac. Each embryo-sac contains egg apparatus, 3 antipodal cells, and 2 polar nuclei.
- The Egg apparatus consists of the large central, haploid egg cells and two supporting haploid synergid cells. Synergid shows hair-like projections called filiform apparatus, which guide the pollen tube towards the egg.
- Antipodal cells are a group of three cells present at the chalazal end.
- The two haploid polar nuclei of large central cells fuse to form a diploid secondary nucleus or definitive nucleus, just prior to fertilization.
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संबंधित प्रश्न
Very short answer type question:
How many haploid cells are present in a mature embryo sac?
Very short answer type question:
Define megasporogenesis.
What is the function of filiform apparatus?
The female gametophyte (Polygonum type) at the time of fertilization is ______.
In which of the following pattern megaspores formed after meiosis of megaspore mother cells are arranged in angiosperms?
Into which of the following the functional megaspore in an angiosperm develops?
The plants like guava and Dalbergia undergo vegetative propagation by ______
Which one of the following plants is dioecious?
The pollen tube after entering into an ovule is attracted by ______.
