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

Investigating the stomata density in Hedera up a wall?

Extracts from this document...


Investigating the stomata density in Hedera up a wall? The point to this investigation is to found out if there is a different between stomata density over two sites, these two sites will be at the top and at the bass of the plant. When you look at this investigation you would think that there would be no difference or the top will have a greater stomata density, so I predict that there will be a difference and the top will have a greater stomata density. The why to found this out is to take leafs from the top and bass of the plant, put nail varnish on then, let that dry, peal nail varnish of the leaf, then place the dry clear nail varnish on a slide, then place this slide under a microscope and count the number of stomata in a 1mm�, then repeat it 6 times on each leaf to get an average of the stomata density on that leaf, repeat it for all leafs. Once you have these use the Mann- Whitney U test to see if there is a difference or not. In my results I found that there is a difference between the top and bass of the plant, with the top of that plant having a greater stomata density. This shows that the theory of transpiration pull which the plant does to get water and other compounds to the top of the plant, by losing water so water can move up the plant so it can carry on life cycle. So my result shows that there is a difference and prove my hypothesis right that the top of the Hedera will have a greater stomata density then the bass of the Hedera. I will be investigating the stomata density in Hedera up a wall, so I will be looking at sites of the plant, one will be at the bass and the other at the top of the Hedrea. ...read more.


Water leafing the leafs creates a transpiration pull, pull is created through water surface tension within the plant cells, the draw of water upwards is assisted by the movement of water into the roots via osmosis it is also assists the plant in absorbing nutrients from the soil as soluble salts. So there would be a greater stomata density at the top of the plant because it will allow the plant to have a transpiration pull. Implementing Stomata density at the bass 1mm� Reading 1 Reading 2 Reading 3 Reading 4 Reading 5 Reading 6 Average Leaf 1 15 13 14 17 16 18 15.5 Leaf 2 14 17 16 15 14 15 15.3 Leaf 3 16 17 15 16 17 19 16.6 Leaf 4 14 15 14 17 16 15 15.1 Leaf 5 14 16 17 16 15 14 15.3 Leaf 6 16 18 17 15 14 16 16 Leaf 7 17 16 18 20 19 18 18 Leaf 8 18 19 17 14 16 17 16.8 Stomata density at the top 1mm� Reading 1 Reading 2 Reading 3 Reading 4 Reading 5 Reading 6 average Leaf 1 19 21 21 18 17 19 19.1 Leaf 2 18 22 27 19 18 19 20.5 Leaf 3 19 17 20 18 21 20 19.1 Leaf 4 21 20 19 22 21 20 20.5 Leaf 5 20 21 19 18 19 20 19.5 Leaf 6 20 21 22 18 19 21 20.1 Leaf 7 23 22 22 21 19 20 21.6 Leaf 8 25 22 22 20 21 20 21.6 Mann - Whitney U test H0 - there is no significant difference between top and bass H1 - there is a significant difference between top and bass Site 1 2 3 4 5 6 7 8 Bass of plant 15.5 15.3 16.6 15.1 15.3 16 18 16.8 Top of plant 19.1 20.5 19.1 20.5 19.5 20.1 21.6 21.6 Site 1 2 3 4 5 6 7 8 score 8 8 8 8 8 8 8 ...read more.


look at the bass middle and top, or even more sites on the plant, as well as looking at more the one Hedera to see if it wasn't only this one plant that was like it, to see if they are all like it. My results are reliable to my investigation as it shows that there is a difference in stomata density, and prove my prediction right. There are limitations on the test, the number of results, the number of sites look at, the microscope used as there are more powerful microscope that would not only make a better picture, but I could been look at the whole leaf to gain a better look at the stomata density, the number of reading though the number I could where a good size, the more you have the better and more relievable your results are, then it will also give a better picture of stomata density, the sites used, the more sites you used a better look at the changes in density you get as you go up the plant. Things like this could be done in further investigation, you know what you going to get, so if you was to look at more plants and sites on the plants, as you can look at the changes and you can discus more, you can't tell from this investigation if it is the same for all Hedera that stomata density is like this, it is likely that it is because of how the plant works and transpiration, but you can't rule out a difference like that. Then also if you two different plant then you can compared the results of the both of them, and this will give a more insight into stomata density of Hedera. Therefore I believe that my result and what I found out is relievable and precise, in my investigation to prove my Hypothesis right and that show there is a different in stomata density over two different sites. Paul Robinson Biology Coursework ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Exchange, Transport & Reproduction 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 AS and A Level Exchange, Transport & Reproduction essays

  1. Peer reviewed

    "An investigation into the Respiration of Carbohydrate Substrates by Yeast."

    5 star(s)

    storage polysaccharide which means it is made up of many (up to 3000) repeating units of alpha glucose(a structural isomer of glucose)joined by condensation reaction. This means there are many glycosidic bonds to break before the covalent bonds between the elements are broken.

  2. Peer reviewed

    Difference in number of Stomata in different leaves

    4 star(s)

    9- Repeat the steps to get 3 results for each section and then repeat with other leaves. I carried out a preliminary experiment where I counted the number of stomata by placing the plant leaf under the microscope. The experiment shown is more accurate than my preliminary experiment as some

  1. The problem of rising deaths due to Malaria in Mumbai, India

    More than 200m insecticide-treated bed nets have been distributed since 2000, and are estimated to have saved 1m lives, according to the Roll Back Malaria Partnership. (13) In March 2008, biologists from the 'Vector Control Research Centre, India' carried out a study into the feasibility and effectiveness of Insecticide - treated nets (ITNs)

  2. Investigating water relations in two different plant tissues

    When plant tissue is placed into this hypertonic solution, water molecules from within the tissue (vacuole) will pass through the cell membrane to the surroundings, which results in the decrease in mass of the tissue sample. This passive process is known as osmosis.

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