Osmosis Lab: Potatoes and Elodea Background Information: Cells have a need to regulate their internal environment. They need to be able to this because cells often find themselves in environments where the concentration of dissolved solids outside the cell is different from the number of dissolved solids inside the cell. Since the solids can not move across the membrane‚ the cell responds by moving water either into or out of the cell in an attempt to balance the number dissolved particles.
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opportunity to achieve success and prosperity through hard work‚ determination‚ and initiative”‚ but the sad part about the American dream is sometimes that’s all it lives up to be. This seems to be the case in the short story “The Egg”. In this short story‚ “The Egg”‚ the egg seems to be an image more than a title. It endorses the idea for a chance at a new life and a chance to get rich. In this story the mother seems to be the one picking at the idea of this life‚ she does so by telling the father
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Department of Food Science and Technology College of Agriculture and Food Science Visayas State University Baybay City‚ Leyte Microbiology of Fish and Fish Products Introduction: Fish is a major staple food in most parts of the world and are second only to meat as the major animal protein in most diets. Whilst foods such as ‘meat’ form relatively well -defined groups of raw materials‚ ‘fish’ constitutes a large range of types (some sources recognise over 20‚000 identified species)‚ caught over
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Osmosis of a Potato cell. Hypothesis is that the potato in saltwater is going to show that it will break down the cells of the potato. Osmosis is the diffusion of a solvent through a semi-permeable membrane‚ from a solution of low solute concentration to a solution with high solute concentration‚ up a solute concentration gradient. Net movement of solvent is from the less-concentrated to the more-concentreated.‚ which tends to redure the difference in concentrations. This effect can be countered
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Microbiology Lecture Notes: I.Cell1/27/14 1. Robert Hooke 2. Basic unit of structure and function in all living things. a. Unicellular à Microscopic b. Multicellular à Microscopic & Macroscopic c. 2 main cell groups: 1. Eukaryote = True Nucleus 2. Prokaryote= Bacteria (only) a. Karyo = nucleus‚ pro= pre‚ Eu= true 3. Components of a cell: a. Nucleus: brain of cell; has nuclear membrane/envelope 1. DNA à Chromosomes (Genes) à make protein à Macromolecule
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Within a matter of weeks it will be Easter time. Eggs will not only be hidden for little children to find but an egg is a symbol of life. Eggs are often the prime example used in a Christian Sunday school to visually explain the Resurrection of Jesus. The eggs shell represents the stone that separated his tomb from the outdoors. When the hard shell barrier cracks‚ or in this case when the stone is rolled away‚ life comes into the world. In the Etruscan tomb of the Lioness lays a Banquet scene fresco
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The Human Egg Cell. The human egg cell is also known as the ovum. With a spherical structure it is the largest cell in the human body measuring about 0.2mm in diameter. The function of the ovum is to reproduce‚ when fertilized by the sperm cell the ovum is capable of creating a new living organism. The size and shape of the ovum gives it space to store and create nutrients (see fig 3) (Boyle and Senior 2008) The ovum is bounded by the egg follicles of the ovaries and is produced by primitive germ
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class average‚ there is evidence that osmosis did occur in the bags. The largest change in mass was in the 1.0M sucrose bag the mass went from 12g initially to 14.2g‚ this gained 2.2g‚ an 18.3% change in mass for the group data over the duration of the experiment. The 0.2M bag went from 10.2g to 10.9g a 6.9% change in mass; the 0.4M bag went from 12.1g to 12.2g .83% change in mass; the 0.8M bag went from 10.9g to 12.2g and an 11.9% change in mass. During osmosis water diffuses‚ going from an area
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Rate of Osmosis Investigation Lab Title: A simple heading referring to your investigation Abstract: Write this section last! It is a brief paragraph or 2 which outlines the purpose‚ the method‚ the pattern of results and the conclusion you reached. It is an overall snapshot of the whole investigation. Introduction: Purpose: Biological Background: All living organisms are made of cells which are surrounded by a membrane. The cell membrane has many functions but the
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Osmosis Lab Report Hypothesis: Osmosis will occur when there is an uneven distribution of solute in a solvent. The higher the solute in solvent‚ then there will be a higher rate of osmosis through the diffusion gradient forming a hypertonic or hypotonic solution. Solvent with equal or no solute forms an isotonic solution. Materials: Distilled water‚ sucrose‚ dialysis tubing‚ string‚ 250 ml beaker. Procedure: To demonstrate and isotonic solution we needed 3 inches of dialysis tubing. We
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