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

    A total of seven readings will be taken for each leave. They readings will be taken at 12 0 clock and then again 24 hours later for seven days. The overall result in water loss will be measured by weighing all the leaves at the start of the experiment (with the inclusion of the petroleum jelly)

  1. An Investigation into Water Loss from Plants.

    It will float on the water to stop evaporation. Repeat this for all 20 test tubes. * Place the extra empty test tube rack on the scientific scales and turn on at 0. Then place each test tube in the rack one at a time and weigh them and record the reading.

  2. Three separate experiments which are to be carried out to investigate a plant's unique ...

    it is a little bit frantic looking at the rule to get a distance and then write it down. This will, in every case of the experiment cause human error (unless of course it is performed by an accurate computer).

  1. The investigation is aiming to look at transpiration.

    Each cell forming a xylem vessel is corresponding to a tracheid and so called vessel element. Vessel elements are shorter and wider than tracheids. Each begins life as a normal plant cell in whose wall a substance called lignin is laid down.

  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 ...

    Reliability, Measurements and Accuracy In this investigation, 60 ivy leaves from a shaded region and another 60 leaves from an unshaded region from the same woodland will be measured. The abiotic factors in both areas will be measured too. Two 10m tape measures will be placed at right angles to each other.

  2. The structure and arrangement of leafs

    The water lily has had to make adaptations to survive this environment. The epidermis produces a leathery and waxy cuticle. The cuticles task is to protect the plant from evaporation. The cuticle is important, as the plant has to protect itself from attacked by any bacteria, fungi or pathogens.

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