Describe the usefulness of water in biosphere and biological systems.

Explanation

Water is essential to all forms of life. Water constitutes about 65% of the body weight of animals and plants and is essential for their growth. We can live without food for some days but cannot live without water. It is also a principal constituent of earth.s surface. In comparison to other liquids, it has characteristic properties such as high specific heat, thermal conductivity, dipole moment, surface tension, dielectric constant, etc., which make water to play a key and significant role in biosphere. The high heat of vaporisation and heat capacity help it for moderation of the climate and body temperature of living beings. It is an excellent solvent for transportation of minerals and other nutrients for plant and animal metabolism. This also plays an important role in photosynthesis in plants which releases oxygen in the atmosphere.