this planet as ice forms it insulates the water below allowing fish and other organisms to survive. If it were denser it would sink and in winters the lakes would be frozen through.
             Water with all these chemical and physical properties the most important is how it effects our daily life and our survival. Water has importance inside cells and externally. Water is the most abundant component in any organism, the lowest is 20% in seeds, while jellyfish are 99% (hence the transparency). It plays vital roles in the metabolism of all cells and in photosynthesis (providing raw materials) in plant cells. In all cells water is used for; hydrolysis, the breakdown of a substance by water, e.g. polysaccharides to monosaccharides. Water can also form a glycosidic bond; a medium for chemical reactions, due to its properties as a solvent. Water is involved in every part of life even breathing through the diffusion and osmosis of substances (gaseous exchange) which need to be moist as the exchange takes place in solution, therefore there is water in the lungs or in mesophyll cells in plants. It is also used on a much larger scale for transport. Blood is mostly water, an!
             d is used to transport food, hormones, waste products (ammonia and urea) and oxygen, similarly in plants, sap is used to transport food and other substances. These substances all easily dissolve in water and then can be tra
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