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  • In which of the following plants double fertilization occurs?Option: 1 PinusOption: 2

In which of the following plants double fertilization occurs?

Option: 1

Pinus


Option: 2

Marchantia     


Option: 3

Ferns


Option: 4

Maize


Answers (1)

best_answer
As we have learnt in 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.

Double fertilization is a characteristic feature of angiosperms, the flowering plants. Maize is an angiosperm, hence option d is correct answer.

Posted by

rishi.raj

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