"Onion epidermis" Essays and Research Papers

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    Cells

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    Drawings vary‚ check to make sure the relative sizes are correct. High Power should show only a couple of cells that take up most of the viewing field. The micoscope is designed to view the slide at different spots‚ so not all drawings will look like this one. Images were snipped from the virtual microscope’s flash animation. Scanning (4) | Low (10) | High (40) | 3. Go to google and type "cheek cells" into the search box. Click on "images" to see all the images google has found on the web showing

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    Ib Topic 9 - Plant Science

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    Topic 9: Plant Science 9.1 Plant Structure and Growth 9.1.1 Draw and label plan diagrams to show the distribution of tissues in the stem and leaf of a dicotyledonous plant. Cross-section of a stem Part of plant | Purpose | Epidermis | Surface of the stem made of a number of layers often with a waxy cuticle to reduce water loss | Cortex Tissue | Forming a cylinder of tissue around the outer edge of the stem. Often contains cells with secondary thickening in the cell walls which provides

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    skin

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    The skin consists of an outer‚ protective layer (epidermis) and an inner‚ living layer (dermis). The top layer of the epidermis is composed of dead cells containing keratin‚ the horny protein that also makes up hair and nails. The skin is made up of two layers‚ the epidermis and the dermis. The epidermis‚ the upper or outer layer of the skin‚ is a tough‚ waterproof‚ protective layer. The dermis‚ or inner layer‚ is thicker than the epidermis and gives the skin its strength and elasticity. The

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    BIOLOGY LAB REPORT PRACTICAL M1 TESTING FOR MACROMOLECULES Title : Testing for Macromolecules Abstract : To test for macromolecules (carbohydrates‚ lipids‚ nucleic acids‚ and proteins)‚ iodine solution‚ alcohol‚ aceto-orcein stain and copper sulfate solution are used. The conclusions for all of the tests are positive. Introduction: A) Carbohydrate (starch) Carbohydrates are chemical compounds that contain oxygen‚ hydrogen‚ and carbon atoms. They consist of monosaccharide

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    Mr Teenoh

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    LABORATORY 1b - Water Potential II LABORATORY 1b: WATER POTENTIAL II OVERVIEW In this laboratory you will investigate the effect of solute concentration on water potential as it relates to living plant tissues. OBJECTIVES Before you begin this lab you should understand: - the mechanisms of diffusion and osmosis and their importance to cells - the concept of water potential - the relationship between solute concentration‚ pressure potential and the water potential of a solution - the concept

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    Laboratory Experiments

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    structures and function. Materials: Microscope cover slip glass slide water onion Iodine soln. hydrilla salt tomato razor blade Medicinal dropper epidermal tissue of rhoeo-discolor Procedure: 1. Onion Cell 1. Prepare an onion bulb 2. Place a drop of water at the center of the slide. 3. Pell off a thin layer from the inner surface of onion bulb [Allium cepa]. 4. Put a cover slip on the specimen and focus under LPO then draw 3

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    calculator collected‚ determine solute potentials of the solutions and answer the questions asked to better understand this particular part of the lab. Lab 1E - Using the materials gathers‚ prepare a wet mount slide of the epidermis of an onion.  Draw what you see of the onion cell under the microscope.  Add several drops of the NaCl solution to the slide.  Now draw the appearance of the cell.

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    Lab Manual

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    Writing of Lab Reports __________________________________________________________________________ W hy should I bother writing lab reports in the correct way?” The Foundation Programme is designed to prepare you for undergraduate studies at UTAR which will require the writing of lab reports all years generally. At the end of your third year‚ you may have an opportunity to work on scientific projects which will culminate in an official scientific report. Depending on the quality of your report

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    Bcsc 513-521

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    for? The plant uses sugars produced during photosynthesis to builts its structure. * Petiole - the stalk that attaches the leaf to the stem. * Covering the upper and lower surfaces of the leaf is a transparent layer of cells called the epidermis which forms a waterproof coating‚ the cuticle. * Substances enter and leave the leaf by two routes: veins and stomates. * Photosynthesis occurs in the mesophyll cells that contain numerous chloroplasts. These mesophyll pile up to make

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    Chapter 39 Plant Responses to Internal and External Signals No groups of plants is more important to human survival than seed plants plants are key sources of food fuel wood products and medicine our reliance of plants Products from Seed Plants Most of our food comes from angiosperms Six crops yield 80% of the calories consumed by humans Wheat Rice Maize Potatoes Cassava sweet potatoes Other Products from Seed Plants Secondary compounds of seed plants are used in medicines

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