Problem: Why do leaves change color in the fall? Background: Leaves contain many pigments such as chlorophyll b‚ xanthophyll‚ and beta carotene besides chlorophyll a. They are part of the photosystem in the thylakoids. Pigment molecules can be separated by a procedure called chromatography. The procedure uses a special paper and solvent. The chlorophyll molecules adhere to the paper. The solvent molecules move up the paper by capillary action. Each chlorophyll molecule will travel up the paper at
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in the 1970s to study the effects of prison conformity on a sample group of college students. This study‚ known as the Stanford Prison Experiment‚ was scheduled to continue for two weeks‚ but it had to be cut short to six days due to the horrendous events that occurred during procedures. Although the majority of researchers currently agree that Zimbardo’s experiment was completely unethical‚ it can be said that the lessons learned from the study are extremely insightful as those lesson continue to
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Aquaponics system is a food production system that combines conventional aquaculture‚ raising aquatic animals such as snails‚ fish‚ crayfish or prawns in tanks‚ with hydroponics cultivating plants in water in a symbiotic environment. In normal aquaculture‚ excretions from the animals being raised can accumulate in the water‚ increasing toxicity. In an aquaponic system‚ water from an aquaculture system is fed to a hydroponic system where the by-products are broken down by nitrogen-fixing bacteria
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increased‚ the average rate of photosynthesis of the leaf discs increased in a linear trend. As it is the sodium bicarbonate which decomposes into carbon dioxide necessary for photosynthesis‚ it is reasonable to consider from Graph 1 that as carbon dioxide concentration of the solution increases‚ the rate of photosynthesis will also increase in a linear trend. Carbon dioxide concentration is shown to be directly proportional to rate of photosynthesis ([CO2] ∝ rate of photosynthesis). The line of best fit
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Psychology of Human Relations Stanford Prison Experiment Reaction Essay Jana Haight March 1‚ 2011 The Stanford Prison Experiment was to study of the psychological effects of becoming a prisoner or prison guard. The study was conducted by a team of researchers led by Psychology professor Philip Zimbardo at Stanford University in August 1971. Twenty-four students were selected after tests and background checks deemed them mentally healthy
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IS PHOTOSYNTHESIS WAVELEGNTH DEPENDENT? THE EFFECT of different COLOR FILTERS ON The rate of photosynthesis in english ivy leaves author: Cherylle chapman partners: sharif alston‚ ALEX SAFAVOV & EDuardo vie (Group 3) OBSERVATIONS & HYPOTHESIS In the lab‚ we observed green plant leaves convert light energy into chemical energy by using photosynthesis. The species of green plant leaves that were used in this experiment were Hedera helix‚ commonly known as English Ivy. These plant leaves have both
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of Energy Transfer is prominent in all of these topics. The Interdependence in Nature is also a theme that comes up especially in plant functions‚ plant and animal cells‚ and leaf anatomy. Although there were many different sub-themes after many experiments‚ research‚ and discussion in class‚ I find that the two main themes that were talked about this quarter are Energy Transfer and the Interdependence in Nature. The theme of Energy Transfer is very important when it comes to both plants’ and animals’
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In 1905‚ Frederick Blackman‚ a British physiologist‚ concluded that photosynthesis‚ the capture of light and conversion of it into chemical energy is a two-way process‚ of which only one uses direct light to trap radiant energy. In the Hill Reaction activity‚ our group will be focusing directly on the light dependent reaction. The overall purpose of this experiment is to try to prove the hypothesis that this reaction does produce compounds that have the energy of light. The first of the two major
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The Zimbardo prison experiment was a study of human responses to captivity‚ dehumanization and its effects on the behavior on authority figures and inmates in prison situations. Conducted in 1971 the experiment was led by Phlilip Zimbardo. Volunteer College students played the roles of both guards and prisoners living in a simulated prison setting in the basement of the Stanford psychology building. Philip Zimbardo and his team aimed to demonstrate the situational rather than the dispositional causes
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Lab Report: Photosynthesis Name: Purpose of this Lab What is the goal of this lab? What question are you trying to answer‚ or what problem are you trying to explain? To see how the plant changes the pH of the water. Hypothesis After reading the lab instructions (but before starting the lab) record your best educated guess about what will happen in the experiment. Explain what lead you to this hypothesis. The think the pH of the water will change when the plant is added. Experimental
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