What does the filiform apparatus do at the entrance into

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

1. It helps in the entry of pollen tube into a synergid
2. It prevents entry of more than one pollen tube into the embryo sac
3. It brings about opening of the pollen tube
4. It guides pollen tube from a synergid to egg

Correct Option: A

Filiform apparatus helps in the entry of pollen tube into a synergid in ovule. Filiform apparatus is in form of finger like projection comprising a core of micro fibrils enclosed in a sheath. The filiform apparatus resembles transfer cells" meant for short distance movement of metabolites. The filiform apparatus responsible for the absorption of food from the nucleus.