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Cells Investigation.

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Introduction

Cells Investigation Aim: In this investigation I am going to learn how to prepare a slide in order to view two different samples of cells under a light microscope. These 2 cells are the cheek cell and the onion skin cell (epidermis). Under the microscope I will observe and record the similarities, differences, etc between the two cells. E.g. do both cells have the following? * Nucleus * Cell Membrane * Cytoplasm * Vacuole * Chloroplasts * And Cell Wall Also under the microscope I will measure the cells to compare the two and find which is larger. I will do this by converting the cell measured in millimetres (mm) to micrometers (�). Prediction: I predict that in this investigation I will find that the plant cell is bigger then that of the animal as read in CGP's KS3 Science Revision Guide, "Size of animal cell is 1/100th of a millimetre whereas the plant cell is 40 times as big as an animal cell." Therefore I believe that the onion skin cell will be bigger then that of the cheek cell. Variables Independent In this investigation there are no variables set by me but may happen by accident. ...read more.

Middle

Conclusion In the investigation I found that yes as said in Prediction that the plant cell is bigger than the animal cell. Also I will see from the table below that the cells have 3 things the same but the plant has 3 additional inclusions within it. Nucleus Cytoplasm Cell Membrane Vacuole Chloroplasts Cell Wall Cheek Cell V V V � � � Onion Skin Cell V V V V V V I know from this that the Nucleus, Cytoplasm and Cell Membrane are essential in a cell as I shall explain: * Nucleus- the brain of the cell. Controls what happens in the cell. * Cytoplasm- substance in which all reactions in cell occur * And the cell Membrane- Controls what goes in and out of cell Also in the plant there are extras: * Vacuole- Cell Sap which the cell feeds on (contains sugars and salt) * Chloroplasts- inside are the chlorophyll a green pigment which absorbs sunlight for the process of photosynthesis * And the Cell Wall- A coating of cellulose which acts as a rigid support for the plant (without this the plant if hit would burst) ...read more.

Conclusion

trapped in the slide so the drawing of the cell was disordered * Too much dye- I had put in too much so this resulted in inaccuracy in drawing the cell * Slide dirty- this obscured vision consequently caused problems in the seeing of the cell If I was to repeat this investigation again I would take certain precautions so in future I don't duplicate this incident again. I would take care to guarantee that these errors are avoided and think ahead to resolve this. Below I give a list of my resolutions: * Light- make sure that you receive maximum light for best results but to boost this up why not include an artificial light * Equipment- this cannot be avoided but check your apparatus before use and take care of it * Air bubbles- This can only be solved by being vigilant when placing the cover slip on and making sure that there are no bubbles within the slide * Dye- read the instructions before carrying out the investigation and proof reading , double checking and asking around if you are doing it right * Dirty slide- when taking a slide pick one that is clean and to make sure wash and dry thoroughly Jahedur Rahman GCSE/GNVQ Coursework ...read more.

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