Lab report OSMOSIS TROUGH A SELECTIVELY PERMEABLE MEMBRANE Introduction: Molecules have kinetic energy. This causes the molecules of the cell to move around and bump into each other. Osmosis is a special kind of diffusion where water moves through a selectively permeable membrane (a membrane that only allows certain molecules to diffuse though). Diffusion or osmosis occurs until dynamic equilibrium has been reached. This is the point where the concentrations in both areas are equal and no
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Evaluation Like any experiment‚ there were a number of potential errors during the procedure of the experiment. Errors could have arisen as a result of the uncertainties associated with the instruments I used to take measurements‚ and also as a result of errors associated with the actual method. Of course‚ due to the limitations of the procedure‚ they could not be eliminated completely‚ so I will explain what I did to reduce them to an acceptable level and how I could have improved my method to
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The Effect of Varying Temperatures to the Rate of Respiration of Bufo marinus Statement of the problem: At which environmental temperature‚ do toads have the highest respiration rate? Most animals obtain oxygen‚ which comprise 21% of the air‚ from the environment. Oxygen combines with hemoglobin of the blood to form oxyhemoglobin. Oxyhemoglobin is transported to the tissues where oxygen is released and used for the metabolic functions of the animal. The functions produce waste materials‚ such
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Children‚ Cell Phones‚ and Possible Side Effects There are possible health risks that go along with allowing a child to use a cell phone. This subject has been debated for years. Many researchers and health care professionals have done studies and given their opinions about it. Although cell phone companies do not opening warn you when you purchase a cell phone‚ I take the advice of risk very seriously. Being a mom‚ I found the following information very helpful when deciding that a cell phone
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BIOLOGY LABORATORY Biologically Important Molecules Carbohydrates‚ Proteins‚ Lipids‚ and Nucleic Acids Objectives In this lab you will learn to: 1. Perform tests to detect the presence of carbohydrates‚ lipids‚ proteins‚ and nucleic acids 2. Recognize the importance of a control in a biochemical test 3. Use biochemical tests to identify an unknown compound Introduction Organic molecules are those primarily made up of carbon‚ hydrogen and oxygen. The common organic compounds of living
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Cell Respiration Respiration is the process by which organisms burn food to produce energy. The starting material of cellular respiration is the sugar glucose‚ which has energy stored in its chemical bonds. You can think of glucose as a kind of cellular piece of coal: chock-full of energy‚ but useless when you want to power a stereo. Just as burning coal produces heat and energy in the form of electricity‚ the chemical processes of respiration convert the energy in glucose into usable form. Adenosine
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biochemistry and molecular biology‚ cell biology‚ histology‚ and anatomy and physiology. Various relevant issues and advances on biomedical sciences (natural history of diseases‚ recombinant DNA technology and genetic engineering‚ stem cell technology‚ etc.) will also be discussed in this course. COURSE GOALS 1. Integrate the Benedictine values and ideals of work‚ study‚ prayer‚ stability‚ conversion of life‚ obedience‚ discipline‚ humility‚ stewardship‚ integrity‚ and community. 2. Develop responsible
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EFFECT OF ROOM TEMPERATURE ON THE BURN-RATE OF A CANDLE BURNS Have you ever wondered whether a candle burns more quickly on a hot day‚ than on a cold day? Or is it the other way around? This science fair project was carried out to compare how quickly a candle will burn at different room temperatures. The experiment was done by measuring how much of a candle will melt in 30 minutes when placed in an environment with surrounding temperatures of 20°C‚ 25°C and 30°C. Hypothesis A candle in a colder
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Cell Worksheet from Chaiken of Biology Cell wall cell membrane nucleus ribosome lysosome mitochondria cilia flagellum vacuoles chloroplasts 1. This organelle takes sunlight‚ water and carbon dioxide and can make organic food molecules and oxygen. Chloroplast 2. This organelle is constructed of cellulose and supports plant cells and prevents them from blowing up. Cellulos 3. This organelle contains enzymes for intracellular hydrolysis of food molecules. Lysosom 4. This organelle takes
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Temperature Effects on Labor Productivity: A Cross-Country Approach Introduction Intro into the topic Hypothesis I will test the hypothesis that higher temperature will adversely affect labor productivity in a country. Outline Purpose The purpose of this paper is to check the effects of temperature on labor productivity to conclude that climate change will have a severe impact on labor productivity in the future. It can be thought of as a domino effect. To begin with‚ populations are increasing
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