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Q.

What is the fate of the male gametes discharged in the synergid?

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a

One fuses with the egg,other(s) degenerates in the synergid.

b

All fuse with the egg.

c

One fuses with the egg and other fuses with central cell nuclei.

d

One fuses with the egg, other(s) fuse(s) with synergid nucleus .

answer is A.

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Detailed Solution

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The two male gametes of pollen tube are discharged into synergid. One male gamete fuses with the egg cell to form zygote. The second one fuses with polar nuclei of central cell to form primary endosperm nucleus.

(2) None of the male gametes are degenerated in the synergid. 

(3) Only one of the two male gametes of a pollen tube fuses with the egg cell of embryo sac.

(4) None of the male gametes fuse with the synergid nucleus.

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What is the fate of the male gametes discharged in the synergid?