Q39 / 199 · NEET 2008 (Mains) · Botany

What does the filiform apparatus do at the entrance into ovule?

  • A
    It guides pollen tube from a synergid to egg
  • Correct answer
    B
    It helps in the entry of pollen tube into a synergid
  • C
    It prevents entry of more than one pollen tube into the embryosac
  • D
    It brings about opening of the pollen tube

Solution

It helps in the entry of pollen tube into synergid : Filiform apparatus is present at the micropylar end in synergid. It is a mass of finger like projections. It releases certain chemical substances which direct the path of pollen tube inside the synergid through micropyle (chemotropic effect)

Hence, the correct answer is option: 'B'.

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