Double Fertilization MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
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Double Fertilization is considered one of the most asked concept.
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23 Questions around this concept.
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EASYThe male gamete moves toward two polar nuclei located in the central cell and fuses with them and produce
The endosperm nucleus is
In angiosperms, the haploid, diploid, and triploid structures of a fertilized embryo sac are:
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Filiform apparatus is characteristic feature of:
Concepts Covered - 1
Double Fertilization
- After entering one of the synergids, the pollen tube releases the two male gametes into the cytoplasm of the synergid.
- One of the male gametes moves towards the egg cell and fuses with its nucleus thus completing the syngamy.
- This results in the formation of a diploid cell, the zygote.
- The other male gamete moves towards the two polar nuclei located in the central cell and fuses with them to produce a triploid primary endosperm nucleus (PEN).
- As this involves the fusion of three haploid nuclei it is termed triple fusion.
- Since two types of fusions, syngamy and triple fusion take place in an embryo sac the phenomenon is termed double fertilisation, an event unique to flowering plants.
- The central cell after triple fusion becomes the primary endosperm cell (PEC) and develops into the endosperm while the zygote develops into an embryo.
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