Q. Plasmodesmata are

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Solution:

The middle lamella may be a layer rich in pectins, which cement the cell walls of adjacent plant cells and form plasmodesmatalconnections. This pectin-rich layer is formed from calcium and magnesium pectates.
Plasmodesmata are cytoplasmic or microscopic channels that are found in the plant's cell walls and few algal cells, which help transportation of drugs and communication between the adjacent cells. These allow the cell to communicate and enable differentiation of plant organs or tissues.