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

How are leaves adapted to control water Loss?

Extracts from this document...

Introduction

Biology Practical Assessment How are leaves adapted to control water Loss? Leaves are made up of several different layers of cells, which are very complex. They all have different functions. Leaves differ from one plant to another. Some may be very large, while some may be small. There could also be a difference in texture, colour and shape. Some leaves may also appear more turgid, while others appear flaccid. Veins on a leaf may differ, some veins may be thick, and others may be thin. Finally width and thickness may change from one leaf to another. A leaf looses water from the Stomata. This process is called Transpiration. To counter act this water loss plants must absorb water from the surrounding soil via its roots. Water enters the root as well as salts/minerals in a process call osmosis. ...read more.

Middle

for one day, I believe I will also find that the smaller leaves will loose the least amount of water/weight, I believe this as in general larger leaves have more stomata to loose water from there fore in a smaller leaf there will be less stomata's to loose water from. Leaf 1st 2nd 3rd 4th 1st weighing 2nd weighing Difference in weight loss % of weight loss Amount of water loss in cm Leaf 1st 2nd 3rd 4th 1st weighing 2nd weighing Difference in weight loss % of weight loss Amount of water loss in cm Leaf 1st 2nd 3rd 4th 1st weighing 2nd weighing Difference in weight loss % of weight loss Amount of water loss in cm Leaf 1st 2nd 3rd 4th 1st weighing 2nd weighing Difference in weight loss % of weight loss Amount of water loss in cm Leaf 1st 2nd 3rd 4th 1st weighing 2nd weighing Difference in weight loss % of weight loss Amount of water loss in cm Conclusion. ...read more.

Conclusion

leaves are less well adapted to cope with water loss, and small leaves are better able to cope with water loss as generally the stomata count is lesser than the count of the larger leaves. This is so because on a larger leaf there is more surface area to contain the stomata's. Evaluation. To evaluate I can say that my results were as I expected. I think the experiment went more or less as we planned and were pleased with the results achieved. I have to say that some results in the tables were a bit wild, although this could be put down to chance, or inaccurate weighing methods. I believe that the weight of the leaf may not have been the best variable to base the investigation around, so am glad of the choice to investigate the size of leaf. Over all I am pleased with the way I carried out this investigation, and with the results achieved. ...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

    An experiment to show how water loss in leaves can vary.

    4 star(s)

    * Using different leaf types could result in an unfair test due to the same principles as the leaf sizes. Prediction I think that covering the underside of the leaf will be the most effective method of preventing transpiration because I am almost certain that the stomata will be there since the majority of leaves do.

  2. The investigation is aiming to look at transpiration.

    bag 5 0.3 0.3 1.0 0.8 0.7+0.5/2 =0.6 0.6/5 = 0.12 Radiator 5 1.3 1.0 2.1 2.0 0.8+1.0/2 = 0.9 0.9/5 = 0.18 Blocking with Vaseline 5 0.5 0.0 1.0 0.6 0.5+0.6/2 = 0.55 0.55/5 = 0.11 Cutting of leaves 5 2.9 0.0 3.7 0.5 0.8+0.5 =0.65 0.65/5 = 0.13

  1. An experiment to investigate the water loss from leaves through stomata.

    For ideal conditions to allow the leaves to transpire efficiently the surrounding atmosphere should not be humid. This will increase the amount of water the atmosphere can hold and this will mean that more water can transpire. Also it should be warm and windy.

  2. An Investigation into Water Loss from Plants.

    The theory of Dixon Jolly is that due to water molecules being cohesive the water molecules are pulled along each route by the previous one and so columns of water are pulled along. Water moves through the leaves taking one of three different routes.

  1. Experiment to Compare Stomata Density in Different Dicotyledonous

    Eucalyptus: This plant is native to western Australian forests. Eucalyptus trees are characterized by leathery, whitish leaves that hang vertically, their edges facing the sun. The leaves are often a silvery colour to help deflect the strong sun rays. Australia temperatures range from 6 - 20 degrees in some areas

  2. Heat loss in Emperor Penguins.

    I then continued on to my final experiments. Their results are shown below, along with averages and accompanying graphs. Results: Fig. Control Time (seconds) Experiment 1 Experiment 2 Experiment 3 Average 0 67 70.5 73 70.2 1 63 67 69 66.3 2 60 64 66.5 63.5 3 58.5 60 64 60.8 4 56 57.5 62 58.5 5 54

  1. Investigating the abiotic factors that affect the size of Ivy leaves in shaded and ...

    pH and NPK testing kit - measure pH and NPK content in the soil samples. 13. Safety Goggles - used when carrying out the pH and NPK test. 14. Plastic gloves - used when carrying out the pH, NPK test, and digging up the soil sample.

  2. The Loss of the Aral Sea

    The result has been an increasingly large difference between the river inflow and the evaporation sides of the seas balance. This has accelerated during the last four decades with disastrous effects. The water has gone but the salt levels or salinity has remained virtually the same, resulting in the salinity

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