Gap junctions and plasmodesmata have what feature in common?

Both allow transport of materials between cells.

Explanation:

Gap junctions are found in animals, they are used as a channel between cells to transport ions, water, and other substances. Gap junctions are developed in vertebrates when a set of six membrane protein called connexins form an elongated, donut-like structure called connexons.

Plasmodesmata. is found in plants, they are special spots or holes in a plant cell wall, that allows cytoplasmic exchange between cells.