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Double fertilization is fusion of

a)

Two eggs

b)

Two eggs and polar nuclei

c)

One male gamete with egg and other with synergid

d)

One male gamete with egg and other with secondary nucleus


Question ID - 6762 | Toppr Answer

Double fertilization is fusion of

a)

Two eggs

b)

Two eggs and polar nuclei

c)

One male gamete with egg and other with synergid

d)

One male gamete with egg and other with secondary nucleus

1 Answer - 5876 Votes

3537

Answer Key : (d) -

(d)

The double fertilization was discovered by S G Nawaschin (1898) and Guignard in and a. Double fertilization is restricted only to angiosperms. When pollen tube enters ovule, it strikes one of the synergids and burst open to release the two male gametes, which fuse with two different structures in the same female gametophyte. Thus, double fertilization can be distinguished as :

1.Generative Fertilization: Fusion of one male gamete with the egg producing diploid zygote or oospore.

2.Vegetative Fertilization: Fusion of nucleus of second male gamete with the diploid secondary (fused) nucleus or the triple fusion,  fusion of one male polar nuclei forming endosperm (3 ).



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