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

Water has a number of unique properties, making it vital for organisms to survive. Without it, life would not ever have evolved. It provides surface tension, allowing many organisms to support themselves

Extracts from this document...

Introduction

Water Water is essential to life itself; with out water life on earth would not exist. Water is a major component of cells, typically forming between 70% and 95% of the mass of the cell. This means that we are made from approximately 80% water by mass and some soft bodied creatures such as jellyfish are made of up to 96% water. Water also provides an environment for organisms to live in, 75% of the earth is covered in water. The properties of water are essential for organisms to live in for a variety of reasons. The one that is most evident is its transparency. The fact that light can travel through it allowed marine life millions of years ago to develop a more sophisticated detection device other than sonar, sight. This is evident with many types of fish using visual effects to deter predators, like schools of fish in a large mass to make it seem as though they are bigger than they actually are. Coupled with the fact that light can travel through water, so can heat; which is essential for aquatic plants to photosynthesise. Water has a molecule of oxygen contained within it; this means that aquatic Organisms such as dogfish are able to extract that molecule for respiration using a series of vascularized gills. ...read more.

Middle

It is also seen in the vascular tissues in plant phloem transport of sucrose and amino acids in solution. 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. The fact that water contains two hydrogen atoms and one oxygen atom is Essential for photosynthesis. During the light dependant stage, the hydrogen molecules of water are separated from the oxygen molecule. And in the light independent stage, the hydrogen molecules from water, react with the carbon dioxide to form a carbohydrate. The process of osmosis is only possible because of the size of the water molecule. Because it is so small, water is able to travel through the semi-permeable membrane of cells in living organisms, which larger molecules cannot fit through. This is useful in plant cells, as water is lost in transpiration, it can easily be replaced by this process. Creating a water column through the plant. Water also plays a key role in the metabolic breakdown of such essential molecules as proteins and carbohydrates. ...read more.

Conclusion

However with the density properties being as they are water is most dense at 4�C. This means even when a pond is frozen over there is a layer of water below the ice at 4�C where organisms can survive. Another importance of water is its lubricating properties. Joint are lined with lubricating membranes. These occur in the space between the bones of most joints. The membranes lining the joints are known as synovial membranes. This is because they secrete synovial lubricating fluid. The hollow tracts, such as the respiratory and glandular ducts are also lined with membranes. Water has a number of unique properties, making it vital for organisms to survive. Without it, life would not ever have evolved. It provides surface tension, allowing many organisms to support themselves and move efficiently. It provides the perfect environment for chemical reactions to take place, due to the fact that it is a universal solvent. Water also has a very high heat capacity, allowing organisms to maintain the appropriate body temperature, which is vital for their survival. Finally, water has a unique structure, involving polarity and hydrogen bonding. By considering these examples and the many others that have also been discussed, it is clear to see how unique and important the chemical and physical properties of water are to all living organisms. ...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 Living Things in their Environment 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 Living Things in their Environment essays

  1. Marked by a teacher

    Taxonomy is the branch of biology that deals with the identification and naming of ...

    5 star(s)

    They have simplistic transport mechanisms and are anchored by root like structures called rhizoids. Mosses and liverworts do not have real roots, stems or transport systems and because they lack true vascular tissue, they are incapable of efficient conduction of water.

  2. Investigating the effect of four antibiotic agents on gram positive and gram negative bacteria.

    * I will use four antibiotic agents. These are Penicillin G, Streptomycin, fresh garlic and odourless garlic. * I will use the same nutrient agar. * I will leave all the inoculated agar plates in the incubator for the same amount of time, which will be 24 hours.

  1. The comparison of bacterial content in a range of milks.

    Wash thoroughly with soap and cold water. Any non-chemical hazards and precautions to be taken When using the glass apparatus, special care must be taken as these can break easily and cause injury Signed (student) Signed (teacher) Disposure of residues The sodium hydroxide is dilute enough to pour down the sink, along with the milk.

  2. To see how Blowfly larvae (Calliphora) react to light.

    At the centre of the circle, draw another circle of radius 2cm (diameter 4cm). Then with the protractor, divide the circle into four sectors: two of 120� and two of 60� as shown below: Label the circle as above. Cut out, and repeat to produce as many as required.

  1. The effect of osmosis on potatoes

    into chip shapes. But it was simpler to measure the mass using scales, as we did not have to rely on our eye sight to gain reliable results. Liv Gell The Plan After evaluating the pros and cons of each of the preliminary tests we conducted, I have decided that

  2. Does life exist on other planets?

    A theory says that chemicals below the earths crust where combining together due to the extreme heat and eventually came to the surface to evolve; this is called the primordial soup theory (see picture above). One theory says that it was due to a meteor; some meteors have been found

  1. cellular respiration

    Method 2 - Experimental procedure Step 1: All materials which were needed to perform experiment were listed down and provided by a lab assistant Step 2: A stand and clamp was needed to be set up in order to hold the test tube in place.

  2. An Investigation into the water quality of the River Banwell in

    These are regulated by a government body, which tests the water quality. These are easier to measure and identify due to the source being known. Depending on the type of pollutant some may take effect metres from entering the water body, while others travel miles before taking effect on the local ecosystem for example, acid rain.

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