title: Solute sensing vs. solvent sensing, a speculation.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D008024:Ligands; D012677:Sensation; D015398:Signal Transduction; D012996:Solutions; D012997:Solvents
chemical_list: D008024:Ligands; D012996:Solutions; D012997:Solvents