Question
(a) From which end of the ovule, and how does the pollen tube gain its entry into the embryo sac of a Hibiscus flower ? (b) State the fate of the male nuclei present in the pollen tube.
Answer :
(a) From micropylar end, through the synergids (filiform apparatus)/filiform (within synergids) apparatus guides the entry of pollen tube
(b) One male nucleus fuses with two polar nuclei to form Primary endosperm nucleus and termed triple fusion, other male nucleus fuses with egg cell nucleus to form zygote i.e. undergoes Syngamy
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