Evolution Lab The finches on Darwin and Wallace Islands feed on seeds produced by plants growing on these islands. There are three categories of seeds: soft seeds‚ produced by plants that do well under wet conditions; seeds that are intermediate in hardness‚ produced by plants that do best under moderate precipitation; and hard seeds‚ produced by plants that dominate in drought conditions. The lab is based on a model for the evolution of quantitative traits-characteristics of an individual that
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TWO-PROCESS THEORIES AND STROOP EFFECT: STUDYING THE EFFECT OF COLOUR CORRELATED WORDS (IV) vs. NEUTRAL WORDS WHEN RECORDING RESPONSE TIMES (DV) FOR IDENTIFYING THE INK COLOUR IN WHICH A WORD IS PRINTED. Abstract The idea of two-process theories and the Stroop effect are assessed in this experiment. The intention is to look for a predicted pattern between the response times of two separate conditions; one using a list of words that are colour related‚ such as “lemon” and another list of words which
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The Red Queen Hypothesis The Red Queen Hypothesis was formulated by Van Valen in 1973‚ and its original purpose was to give an understanding of the adaptation dynamics between species (Vermeij and Roopnarine‚ 2013). The principles of The Red Queen Hypothesis is clearly formulated in McCune (1982)‚ that states ”all taxa are running on a treadmill powered by an environment which deteriorates at a stochastically constant rate. The result is that an ancient taxon is no better adapted than a younger
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1 Hypothesis If you soak an egg in vinegar‚ then the shell will deteriorate and loose centimeters off of it’s circumference. Data and Observations Time (hrs) Observations Circumference (cm) 0 1. The egg is whole‚ and has not lost color. 2. The egg was immediately surrounded by bubbles. 3. 14 cm 4. 24 1. The egg appears to have a little bit of color missing. 2. The egg remains firm. 3. 15.5cm 4. 48 1. The eggs shell is beginning to disappear. 2. The shell of the egg is cracking
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In ecology‚ competition occurs between any organisms living in a mutual habitat. Competition can either be harmful or helpful to each organism‚ whether it is for food‚ water‚ shelter‚ etc. There are two basic types of competition: intraspecific competition or interspecific competition. Intraspecific competition is the competition that occurs between the individuals of the same species (T. Smith & R. Smith pg. 222). On the other hand‚ interspecific competition is the competition that occurs between
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The Affctive Filter Hypothesis :- The fifth hypothesis‚ the Affective Filter hypothesis‚ embodies Krashen’s view that a number of ’affective variables’ play a facilitative role in second language acquisition. These variables include motivation‚ self-confidence and a low level of anxiety are better equipped for success. Low motivation‚ low self-esteem‚ and debilitating anxiety can combine to ’raise’ the affective filter and form a ’mental block’. Comprehensible input may not be utilized by second-language
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is the variable held constant in an experiment that never changes and isn’t meant to be changed e.g. Statistics‚ a person‚ a group and an event etc. The control variable controls the experiment. Hypothesis- a hypothesis is much like a theory‚ but with more background evidence supporting the hypothesis. Dictionary answer: 1) A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. 2) A proposition made as a basis for reasoning‚ without
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participant’s responses (DV) Dependent variable – the variable that the experimenter is measuring‚ shows any effects of the IV It is called the DV because whether or not it will change and the way it will change depends on the effects of the IV Research hypothesis – testable prediction about the relationship between two or more variables Contains the IV and the DV and population about which the researcher intends to draw conclusions (IPAD) The population is the entire group of research interest from which
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Relationship between Absenteeism and Job Performance Introduction Absenteeism has long been considered a significant and pervasive problem in industry. As a result‚ theories have been developed and numerous studies conducted to identify the causes of absenteeism. Probably one of the most common theories is the notion that absenteeism is caused by employees avoiding a painful or dissatisfying work situation. By the same token‚ this hedonistic theory would predict that employees who find
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Drosophila has proven to be very useful tool. Because high alcohol levels has been shown to have an effect of development of the human fetus‚ we asked whether similar effects are observed and to what extent in the Drosophila. In order to test this hypothesis‚ Drosophila were treated with varying levels of alcohol at various times during embryogenesis. Our results demonstrate that as little as 10% alcohol treatme nt has profound effects on Drosophila development. In addition‚ embryogenesis was delayed
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