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What does the filiform apparatus do at t...

What does the filiform apparatus do at the entrance into or Function of filiform apparatus is to
(a) Brings about opening of pollen tube
(b) Guides pollen tube from synergid to egg
(c) Helps in the entry of pollen tube into synergid
(d) Prevents entry of more than one pollen tube into embryo sac

A

It brings about opening of the pollen tube

B

It guides pollen tube from a synergid to egg

C

It helps in the entry of pollen tube into a synergid

D

It prevents entry of more than one pollen tube into the embryo sac

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