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 Role and significance of water Water plays a crucial role in the life of the plant. Water is called  liquid of life, because life is originated and in the course of evolution.  It become fully dependent upon water in a number of ways. Water is one of the most plentiful chemical available in the earth and chemical formula is H2O. Water molecules consists of an oxygen atom and two hydrogen atom. oxygen atom is more electronegative than hydrogen tends to attract the electron of the covalent bond. this attraction result in a partial negative charge at the oxygen in the of the molecule and a partial positive charge at each hydrogen atom. Water has a special property of solvent which is transported through the body of the plant and animals. solvent properties is derived from polar structure of the water molecules. Structure of water molecules. Polarity of water molecules give an excellent solvent. Hydrogen bonding are due to cohesive and adhesive properties of water. Thermal p...