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Anexplanationof howplantcellscommunicateacross cell walls will most likely refer to thediffusionthroughplasmodesmatais Small, water-solublemolecules.Smallwater solublemoleculesoften cross the membrane through the process ofDiffusion. It is known as passivetransportdue to the fact that noexternalenergyis used.Polarmolecules, such as water and smallwater-solublemolecules example urea,chlorideions, sodium ions etc. oftendiffuse across membranes through thewater-filledchannels formed by membraneproteins.Plasmodesmataare refered to adconnectionsthrough which cells communicatechemicallywith one another via theirthickwalls.Learn more frombrainly.com/question/14327801...