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The filiform apparatus plays a role in guiding the pollen tube into the synergid within the ovule.

1. The filiform apparatus consists of finger-like projections made up of a core of microfibrils surrounded by a sheath. It resembles transfer cells, which are involved in short-distance transport of metabolites, and aids in absorbing nutrients from the nucellus.
2. Option B
3. Option C
4. The microspore mother cell (MMC) is encased by a callose layer located beneath the cell wall.

Correct answer: The filiform apparatus consists of finger-like projections made up of a core of microfibrils surrounded by a sheath. It resembles transfer cells, which are involved in short-distance transport of metabolites, and aids in absorbing nutrients from the nucellus.

Solution

The filiform apparatus is a structure in synergids that guides the pollen tube for fertilization. It facilitates the entry of the pollen tube into the ovule.

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