"Onion epidermis" Essays and Research Papers

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    Practical 7 Osmosis

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    against cell wall‚ causing the cell to become turgid. However‚ animal cells do not have cell wall and huge gain of water molecules will cause the burst of the cell. The main purpose of this practical work is to observe the osmosis in potato cubes‚ onion epidermis cells and visking tubes. To examine the effect of different concentrations of sucrose solutions on the plant cells and dialysis tubings. Hazards Precautions Sharp knife‚ scalpel‚ broken glass may cause injuries. Wear lab coat‚ gloves and safety

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    Practical Work Nº2: “Different methods to control osmosis” Aim: observe and test the process of osmosis through different kinds of methods: the weigh (potato)‚ the density (beetroot) and under the light microscope (onion). Hypothesis: according to the encyclopedia definition osmosis is the diffusion of a liquid (most often assumed to be water‚ but it can be any liquid solvent) through a partially-permeable membrane from a region of high solvent potential to a region of low solvent potential. Thus

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    Observing osmosis‚ plasmoylsis and turgor in plant cells Investigation * Get a single layer of plant cells. If you are using red onion‚ cut a 1 cm square from a fleshy piece of onion and then peel off a single layer of the red cells. If you are using rhubarb‚ peel a piece from the epidermis. If you are using toadflax peel a piece of the lower epidermis of a leaf. * Place the strip on a slide and cover it with a drop or two of distilled water. Add a cover slip. * Look at the cells through

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    shoot system of plants

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    section of the leaf including an enlarged part which is the midrib that is located in the lamina and has fine extensions called veins. Some leaves are flat and wide; others are spiky and thin. Three distinguishable areas such as‚ the upper and lower epidermis that are perforated by small openings called stomata‚ mesophyll and the vascular tissue was revealed. INTRODUCTION  Leaf is the primary photosynthetic organ of most plants. Leaves are usually flattened blades that consist‚ internally

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    Benefit of leaves

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    Benefit of potato: Blood-Pressure Lowering Potential good source of vitamin C‚ a good source of vitamin B6‚ copper‚ potassium‚ manganese‚ and dietary fiber. Benefit of pandan leaf: the leaves are used for treating diseases of the skin leaf is used in making grass green Pandan cake Benefit Of Lotus Leaf: used for treatment of summer heat syndrome and dampness accumulation lowering blood lipids

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    Biology Lab Manual

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    Guidelines for writing laboratory reports Laboratory reports should be written according to the format below (failure to do so will result in marks being deducted): Formatting Font Type: Times Roman Font size: 12 Spacing: 1.5‚ justified Pages : 5 (minimum) - 10 (maximum) [pages must be numbered] Title page You are required to use the lab report submission page available on the LMS and are to include these details: lab no.‚ title of experiment‚ students’ names and ID‚ date of experiment as well

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    Plant Cell

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    PLANT CELL Introduction Plant cell is the basic unit of structure and function in nearly all plants. The range of specialization and the character of association of plant cells are very wide. In the simplest plant forms a single cell constitutes a whole organism and carries out all the life functions. In just slightly more complex forms‚ cells are associated structurally‚ but each cell appears to carry out the fundamental life functions‚ although certain ones may be specialized

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    OSMOTIC POTENTIAL OF CELL SAP OF PLANT EPIDERMAL CELLS Aim: The purpose of this experiment is to investigate the effects that the molarity of the sucrose solution and distilled water have on the plasmolisys of epidermal cells of a red onion. Hypothesis: Taking in consideration osmosis‚ and my knowledge about it‚ my prediction is that as the molarity of the solution under which the cells are exposed will increase‚ also the amount of plasmolysed cells‚ counted from amount of undamaged cells

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    starch granules in the potato cells. This shows a positive test for starch. Discussion In the test tube that containing water‚ no cloudiness was observed Test for nucleic acid Result Discussion When the slide of onion epidermis that was stained with aceto-orcein stain was viewed under the microscope‚ it was found that each cell contained one red spot. These red spots contained nucleic acid and were actually the nucleus of the cell. Test for protein Result After

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    vision diameter with a stage micrometer and it is 2mm. If high power is 40X and gives 10X more magnification than scanning power‚ how big will the diameter of the field of vision be using high power? a. 20mm 1. How many layers thick is the onion epidermis? a. 1 2. What is the general shape of a typical

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