Final answer:
Plant cells communicate via plasmodesmata, which are channels connecting adjacent cells for the transfer of substances. Animal cells use different structures such as tight junctions, gap junctions, and desmosomes.
Step-by-step explanation:
Plant cells can communicate with each other via plasmodesmata. These are numerous channels that pass between the cell walls of adjacent plant cells, which connect their cytoplasm and allow for the transfer of signal molecules, solutes, water, and nutrients from cell to cell. In contrast, animal cells are connected and communicate through tight junctions, desmosomes, and gap junctions.