was possible for organic molecules to have formed from inorganic molecules in a reducing and energy-rich environment similar to early Earth Numerous organic molecules (amino acids)were produced in the simulated conditions 1. QUESTION - Scientists question whether life could originate on ancient primitive Earth. 2. HYPOTHESIS - 1923 Haldane & Oparin propose hypothesis that life originated as simple molecules followed by cells - conduct simple experiments that show that organic compounds can form
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KINESTHETIC‚ (STATIC) EQUILIBRIUM AND ORGANIC SENSES * STATIC EQUILIBRIUM Equilibrium or balance monitors the position and movement of the whole body. In a strict sense‚ inner ear is the biological gyroscopes for sense of balance. EQUILIBRIUM * Hair cells in the vestibular membrane or semicircular canals of the inner ear are receptors for balancing. Vestibular sacs which connect the canals with the cochlea are substances that move when the head rotates or tilts. * Head movements
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Is it normally acceptable to experiment on non-human animals to develop products and medicines that benefit human beings? New scientific research has cast grave doubt on the safety testing of hundreds of thousands of consumer products. Everyday products‚ from soft drinks to paints‚ contain numerous synthetic chemicals. Official assurances of the safety of these chemicals are based largely on animal experiments. But recent results from a consortium in America suggested such assurances may be worthless
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Purpose: To find the initial velocity of a marble leaving a ramp using time‚ range‚ and background information learned in class. Equipment: The equipment used in this experiment was a toy track and ramp‚ a small marble‚ multiple Physics textbooks‚ meter sticks‚ bright-colored cardstock‚ masking tape‚ sidewalk chalk‚ plastic bag and a cloth. Procedure: Our experimental values include the height that the marble would travel‚ y= 88.1 cm‚ and our ramp angle‚ θ= 44.0°. These independent variables
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Brenda Richardson Intro. to Psych. Chapter 6 Part 2 Loftus Experiment Elizabeth Loftus‚ a psychologist and expert on memory‚ has conducted much research on human memories‚ real and imagined‚ and how that may happen. Loftus‚ personally‚ has experienced the misinformation effect and eyewitness memory. Even though there are several experiments outlined‚ I chose the ’Lost in the Mall’ experiment as more fitting to the sex abuse testimony she gave. Participants‚ twenty-four of them‚
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Kean Gerard Sumayo Experiment 1 APPLICATION OF STATISTICAL CONCEPTS IN THE DETERMINATION OF WEIGHT VARIATION IN SAMPLES I. OBJECTIVES 1. To determine the use of the different statistical concepts 2. To perform the proper applications of the statistical methods/ concepts on determining the weight variations of samples II. RESULTS and DISCUSSIONS A. Weight of Samples Ten 1-peso coins were used as samples for this experiment and were weighed carefully
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Section November 7‚ 2012 Abstract The effect of water and fertilizer on corn seedlings was examined. It was hypothesized before the experiment that enough water with sunlight and air should make the plants grow healthy. It has to do with photosynthesis. Fertilizer is also going to make the plants grow much faster; this is because of the nutrients in it. The experiment took about four to six weeks to complete; it took some days for the seed to germinate before planting. The corn was growing there were
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UV4297 March 24‚ 2010 THE ABERDEEN EXPERIMENT The phone rang yet again‚ but Sarah Mann‚ general manager of the BAE Systems plant in Aberdeen‚ South Dakota‚ was ready. Experience told her what the question would be: Had the “Aberdeen experiment‚” begun by Bob Lancaster when the plant was built‚ undergone any changes over the past quarter century? From the beginning‚ Lancaster’s design and management of the plant‚ which produced missile launch canisters for the U.S. Navy‚ were unusual—and successful
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if this medicine cures the disease. All of these cases relate to decision making. We cannot reach a conclusion in these examples unless we have access to data. Data can be obtained from observational studies‚ experiments‚ or surveys. This article is devoted mainly to controlled experiments. However‚ it also explains observational studies and how they differ from surveys. Suppose two diets‚ Diet 1 and Diet 2‚ are being promoted by two different companies and each of these companies claims that
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3. Why don’t the terms depolarization and action potential mean the same thing? The terms depolarization and action potential differ because are excitable cells that communicate by transmitting electrical impulses that are capable of producing rapid electrical signals and depolarization in the interior surface of the membrane which becomes less negative and the exterior surface becomes less positive. Additionally‚ when depolarization reaches a certain threshold‚ an action potential is initiated
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