• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Biological Importance Of Water.

Extracts from this document...


Biological Importance Of Water Water is an essential part of life, it takes up between 60 and 95% of mass of living organisms, it plays an important part in cells and also many organisms live in water. I am going to talk about physical properties of water and the biological importance of water. Physical properties of water Hydrogen bonding is when a water molecule forms hydrogen bonds, it form with up to four other water molecules. Water is a polarized molecule, this means it can form hydrogen bonds with other water moles because hydrogen is slightly positively charged and oxygen is slightly negatively charged due to in water oxygen's nucleus attracts the electrons more than the hydrogen's nucleus. ...read more.


At the surface of a liquid a force known as surface tension takes place, this makes the molecules attract. Biological Importance of water Water is a good solvent for polar substances. Polar water molecules and ions have greater force of attraction between them, than cation and anion. For example sodium chloride is separated in water, sodium+ ions are attracted to the oxygen atoms of water because they are slightly negatively charged, chlorine- ions are attracted to hydrogen atoms because they are slightly positively charged. Transpiration Stream Water is able to move up the xylem due to cohesion taking place between water molecules and adhesion between water and the xylem vessels walls. Supporting role Water cannot be easily compressed due to cohesion between water molecules. ...read more.


Ice forms only at the top of lakes, ponds, and so life can exist underneath the ice. The ice insulates the water below and increases chances of survival. Due to change in density water circulation still is able to take place, and it helps the nutrient cycle. Metabolic functions Water is used to reduce power in photosynthesis, it plays a part in chemical reactions also it is sued in digestion. Thermoregulation Due to water having high specific heat capacity organisms made up largely of water molecules are thermo stable. Also due to high latent heat vaporization of water living organisms can be cooled without loosing much water. Conclusion I therefore conclude saying that life on earth would not exist if water did not exist, as I have already described water is used everywhere and is essential for life. Anila Patel 1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Green Plants as Organisms essays

  1. Marked by a teacher

    The Biological Importance of Water.

    4 star(s)

    This stronger attraction is called surface tension, which makes the surface of the liquid slightly more difficult to break through in. When a small object that would normally sink in water, is placed carefully on the surface, it can remain suspended on the surface due to surface tension.

  2. The biological importance of water

    As there are many solutes in cytoplasm the water will not freeze until well below 0oC and the cells are protected until the temperature gets extremely low. The density of water increases as it cools and the hydrogen bonds between the water molecules take on a more latticed formation as ice.

  1. The Biological Importance of Water

    Things that are denser than water generally sink. The surface tension of water can make a solid-like surface and support relatively dense objects such as insects. The cohesion of water helps its molecules to stick together when they are pulled. This can be demonstrated by sucking water through a straw.

  2. The Biological Importance Of Water.

    The reason that ice floats on water is that water has its maximum density at 4�C, which is when the bonds are closest together. When water freezes the lattice arrangement of its structure move apart slightly and it floats on the surface.

  1. The Biological Importance of Water

    Water's properties as a solvent are vital to life as most biochemical reactions such as respiration occur in solution. This is why cell cytoplasms contains about 90% water. Water cannot dissolve hydrophobic substances such as fats and oils. These are used by organisms as cell membranes to separate cells and

  2. The effects of organic effluent from the seweage on the biodiversty in a freshwater ...

    High heat capacity of water effectively buffers the temperature changes in aquatic habitats. Organic effluent from the sewage reduces this ability of water and causes high temperatures enzymes from saprophytic bacteria are denatured as the kinetic energy of molecules increases and they vibrate more leading to a breakdown of the

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work