Does double fertilization occurs in Bryophytes if not why?
Answers
Answer:
Angiosperms have a unique phenomenon of "Double Fertilisation" in which, after the release of two male gametes inside the embro sac by the pollen tube, one male gamete i.e. the first male gamete which is too near to egg fuses with egg nucleus and this phenomenon is known as fertilisation or syngamy. During syngamy, zygote is formed.
The other male gamete i.e. the second male gamete migrates towards the secondary nucleus (formed from fusion of two polar nuclei) and fuses with it. This phenomenon is known as triple fusion and results in the formation of a triploid primary endosperm mother cell.
From all the options given in the question, Pinus is a gymnosperm , Selaginella is a pteridophyte and Funaria is a bryophyte, so double fertilisation is not present in these plants as double fertilisation is unique to Angiosperms.
Since, Dalbergia/ Capsella are Angiosperms, double fertilisation will occur in them.
Answer:
Double Fertilisation" in which, after the release of two male gametes inside the embro sac by the pollen tube, one male gamete i.e. the first male gamete which is too near to egg fuses with egg nucleus and this phenomenon is known as fertilisation or syngamy. During syngamy, zygote is formed.
The other male gamete i.e. the second male gamete migrates towards the secondary nucleus (formed from fusion of two polar nuclei) and fuses with it. This phenomenon is known as triple fusion and results in the formation of a primary endosperm mother cell.
From all the options given in the question, Pinus is a gymnosperm , Selaginella is a pteridophyte and Funaria is a bryophyte, so double fertilisation is not present in these plants as double fertilisation is unique to Angiosperms.
Explanation:
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