Exam 3 Directions: Identify the letter of the choice that best completes the statement or answers the question. Then mark your response on the answer sheet. Unless otherwise stated‚ demand curves are negatively sloped and supply curves are positively sloped. The midpoint and point formulae for elasticity are‚ respectively: ____ 1. If the government wants to reduce smoking‚ it should impose a tax on a. buyers of cigarettes. b. sellers of cigarettes. c. either buyers or sellers of
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Osmosis The purpose of this lab is to study how membranes of plant and animal cells react when exposed to different solutions. The first experiment involves purple onion skin and the second involves rat blood in various solutions. I needed to understand certain terms before preforming this lab to be able to efficiently explain what is happening to the cells. Diffusion is the tendency of a substance to move down its concentration gradient from a more concentrated to a less concentrated area.
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Question 1: How does Osmosis works It refers to the movement of water molecules from an area of high-level water concentration‚ that is‚ a dilute solution‚ to an area of low-level water concentration‚ that is‚ a strong solution through a semi-permeable membrane. (Passmyexams.co.uk‚ 2015) Actually‚ water moves in a bi-directional manner with the aim of leveling up the concentration. However‚ a high number of water molecules move from the fresh water towards the salty water. The outcome
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while the other two potatoes remained firm. There was also an awful odor that only came from the potato in the tap water. Conclusion: The hypothesis was correct. The 40% salt solution killed the sailor. This solution was hypertonic which causes osmosis to move the water out of the cell. The sailor then became too dehydrated and died. Salt absorbs water‚ which is why drinking salt water is not good for
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investigate the movement of water into and out of plant cells by osmosis. The cells chosen for study will be taken from potato tubes as they provide a ready supply of homogeneous material. I did the investigation in two parts‚ the first part of my investigation was my preliminary investigation and then I did my official investigation. In both of my investigations there are several similarities‚ such as fair testing‚ variables‚ key variables‚ reliability of evidence and safety precautions. In
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LAT1 Task 5 Final 8-2-11 Paul D Burns Western Governors University Unemployment is a Serious Social Issue Unemployment is the condition and extent of individuals out of work within an economy‚ measured by the “official” unemployment rate (U-5). This measure is the number of unemployed workers divided by the total civilian labor force. As of June the “official” unemployment rate stands at 9.2%. What is rarely reported‚ and even more ominous‚ is the underemployment rate. This rate includes two
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AHP216 04/16/13 I. Introduction: The purpose of this experiment is to observe the osmosis reaction in a potato with salt and water. In cooking cooks will soak their cut potato’s in water if they will not use them immediately. This allows the potato’s to be used later without turning color. The experiment shows the flow of water through the membranes of the potato with salt over a period of four hours. II. Objective: The reaction of the potato to the side submerged in water and the half excavated
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African Journal of Business Managem ent Vol. 5(22)‚ pp. 9363-9369‚ 30 September‚ 2011 Available online at http://www.academicjournals.org/AJBM DOI: 11.5897/AJBM11.1140 ISSN 1993-8233 ©2011 Academic Journals Full Length Research Paper Business key success factors in China and the West Hung-Chen Huang1‚ Kestutis Bruzga2* and Ya-Ping Wang3 1 School of Continuing Education‚ National Taiwan Normal University‚ Taipei‚ Taiwan. Graduate Institute of International Affairs and Global Strategy
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Diffusion and Osmosis Introduction Tonicity refers to the concentration of solutes in a solution (Lab 6-7). There are three stages of tonicity: Isotonic‚ hypertonic and hypotonic. Four unknown solutions were given and labeled as followed: Solution A‚ Solution B‚ Solution C‚ and Solution D. Since potato cells were used for this type of experiment‚ in an Isotonic solution the solute and water concentration are the same as inside the cell in which the isotonic solution contains 0.9% NaCl. In other
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Unit 4 Lab – Effects of Osmosis on Living Tissue Assignment Total: 35 Points Course Weight: 6 Pre-Lab Preparation - Review the following resources to complete this assignment: Textbook: Chapter 5‚ pg. 83-86 Mastering Biology / Study Area / Chapter 05 – The Working Cell / Student Home Key Concepts Video: Plasmolysis Video: Turgid Elodea Activity: Membrane Structure Activity: Diffusion Activity: Osmosis and Water Balance in Cells Bioflix: Membrane Transport Additional Resources Blast Animation: Diffusion
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