Egg apparatus is a group of three cells found at the micropylar end of a common angiosperm embryo sac. The three cells are – an egg cell and two synergids.
The egg apparatus is formed because of the mitotic division of the megaspore.
The synergids have thick finger-like projections called filiform apparatus, which guide the incoming pollen grains to the ovule.
The filiform apparatus has thick and extensively invaginated cell walls at the end of synergids and is structurally very similar to transfer cells.
The egg cell, after fusion with the pollen, forms a zygote and completes the process of fertilization.

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FAQs

There is a single egg apparatus in the embryo sac consisting of an egg cell and two synergids.

The filiform apparatus is important because it guides the entry of pollen grains into the ovule.