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

Water’s importance in biological processes in living organisms and as an environment for these living organisms.

Extracts from this document...

Introduction

Water's importance in biological processes in living organisms and as an environment for these living organisms Life as we know it emerged from the water and the organisms that left the oceans, lakes and rivers survive only because there cells are constantly bathed in the life-giving liquid. Water is fundamental to all life due to a number of unique physical and chemical properties it posses. An example of one of these properties is that water is an excellent solvent for many substances (ions and polar molecules), thus many things dissolve in water. The reason for this ability to dissolve is due to the fact that water is a polar substance which means that it contains an uneven charge, this is because the charge on the hydrogen atoms in H2O is slightly positive and the charge on the oxygen atom is slightly negative. This is a very useful property because when an ion enters a volume of water the ions become hydrated; the slightly negative oxygen is attracted to the positive cation and the slightly negative hydrogen atoms are attracted to the negative anion, this means that the anions and cations become surrounded by H2O and this breaks up the bond between the two ions in the ionic substance. ...read more.

Middle

vaporization, so when we sweat we transfer a lot of energy into evaporating the liquid and subsequently it cools the body with a minimal water loss. Water is a cohesive substance whereby the molecules will stick together making it a substance which is not easily compressed thus making it ideal for the support role it plays in the plants transpiration stream. Also this cohesive property is vital in the development of a foetus, as the amniotic fluid in the amniotic sac is made up largely of water which gives support to the growing baby inside the womb. As water is a viscous substance it is ideal for lubrication within body for example pleural fluid is made up largely of water and it helps to minimise friction between the lungs and the rib cage. The properties that make water so fundamental in the biological processes of animals are the same properties that give water its ideal characteristics as a living environment upon which so many varieties of species thrive in. Water covers around 2/3 of earth and houses millions of animals all of which have evolved to use water's properties to gain the best chance of survival possible. ...read more.

Conclusion

force they exert on the water is less than the cohesion between the molecules and therefore the small inter-molecular hydrogen bonds are not broken and surface remains flat and strong enough for the insects to walk on. The volatility and stability of water is in fine balance with the changing of temperature of the earth so that a water cycle can be maintained whereby water is transported and deposited in different places feeding ecosystems everywhere. Sometimes waters life-giving properties can work in the opposite way intended and actually do damage for example because water is such a good solvent many harmful chemicals can pass into it unchecked and unseen and be transported very quickly doing damage to any ecosystems it comes across. An other example would be that because water so ideal for living in , it is a breeding ground for human harming bacteria which causes diseases such as cholera ,so people, particularly in third world countries, who don't have access to clean treated water will be afflicted with such diseases because they have to drink the dirty water in order to survive. Water is something we take for granted, we always expect it on tap and never truely give much though to the necessity of it, without water life would cease to exist. ...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 roles water in living organisms and water as a habitat for organisms

    5 star(s)

    Surface tension As the water molecules are cohesive to each other, this results in surface tension of the water as the molecules along the surface are 'holding' each other together. This property allows organisms, such as the pond skater, to settle on or skate over water.

  2. Marked by a teacher

    "The Importance of Water to living Organisms"

    4 star(s)

    Water is remarkable its properties as a solvent are attributed to the fact that it is a polar molecule with positively charged hydrogen atoms and a negatively charged oxygen atom, because of this structure other polar molecules readily dissolve. This is of great importance as most biological molecules are of a polar nature.

  1. "The Importance of Water and its Properties for Living Organisms"

    Water's cohesive forces bring molecules close together, so that it is not easily compressed, thus making it useful for supporting organisms. Examples of this would include; animals such as earthworms and jellyfish which have hydrostatic skeletons meaning that they are supported by the medium inside them.

  2. The roles water in living organisms and water as a habitat for organisms

    This property allows organisms, such as the pond skater, to settle on or skate over water. Sexual reproduction In the process of fertilization, the sperm is transported to the egg in a fluid medium known as semen - this contains mostly water.

  1. Describe the Critical Role That Water Plays In Maintaining Life on Earth, Both as ...

    All living things need continuing supplies of water to survive. A plant needs water to keep up the internal pressure or turgidity in its cells and tissues (which maintains the plant's shape), to bring in dissolved minerals and raw materials from the soil, and for photosynthesis.

  2. The Importance Of Water To Living Organisms

    are lipids, whose lack of polarity makes them insoluble. The fact that most small biological molecules dissolve in water is very important because all the chemical reactions that take place in cells do so in aqueous solution. Plants cam only obtain mineral salts in solution and human digestion will only

  1. Describe how the properties of water are related to its roles in living organisms ...

    nutrients from roots up to the leaves, and allows the movement of blood through tiny vessels in the bodies of some animals. Water has a high specific heat and it can absorb large amounts of heat energy before it begins to get hot.

  2. Describe and explain the roles of water in living organisms and as an environment ...

    Green plants need water as a raw material to produce glucose by combining with carbon dioxide from the air in the presence of light energy. Minerals and nutrients get transported up and through the plant via water when water is absorbed from the soil.

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