Christy Atangana 703 Science HW “What is Natural Selection?” p. 104&105 Qs 1-4 (in the text) and 1-5 (after the text) 1. The evidence that shows that organisms have evolved throughout Earth’s history is the fossil record. The fossil record manifests that that there was change during the course of Earth’s history. 2. The reason why I think Lamarck’s hypothesis was proven wrong is because there was more evidence that proves it was wrong than right. In the beginning
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Sexual selection: it is part of natural selection. Sexual selection acts on an organism’s ability to obtain or successfully couple with a mate. Selection makes many organisms go to extreme lengths in order to find a mate such as: peacocks need to develop a beautiful tail‚ elephant seals fight over territories…. Sexual selection is often powerful enough to produce features that are harmful to the individual’s survival. For example‚ extravagant and colorful tail feathers or fins are likely to attract
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| |Pipe is one of the more common types of plastic product we are familiar with. Pipe is produced by an extrusion process. Basically extrusion can be | |defined as forcing a material through a die orifice. This die orifice produces the final shape of the finished product. It is probably a bit of over| |simplification‚ but extrusion is somewhat analogous to squeezing toothpaste through a tube.
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“SMART MATERIALS” ABSTRACT The world has undergone two materials ages‚ the plastics age and the composite age‚ during the past centuries. In the midst of these two ages a new era has developed. This is the smart materials era. According to early definitions‚ smart materials are materials that respond to their environments in a timely manner. The definition of smart materials has been expanded to materials that receive‚ transmit or process a stimulus and respond
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Abstract: Having study natural selection and artificial selection we wanted to select for a trait on the plant Brassica rapa. We hypothesized that the leaf density is heritable and veritable. After our experiment we were able to conclude that our hypothesis was refuted because our average leaf density in our daughter population increased. Introduction: We are artificially selecting for a trait in the plant Brassica rapa. ( Wisconsin Fast Plant). Brassica rapa has been artificially selected
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Composite materials A composite material consists of two or more physically and/or chemically distinct‚ suitably arranged or distributed phases‚ with an interface separating them. It has characteristics that are not depicted by any of the components in isolation Most commonly‚ composite materials have a bulk phase‚ which is continuous‚ called the matrix‚ and one dispersed‚ non-continuous‚ phase called the reinforcement‚ which is usually harder and stronger. The arrangement of the fiber in the matrix
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Essay 15: What is the purpose of the sensorial materials? Describe the essential qualities needed in a sensorial apparatus. “The first of the child’s organs to begin functioning are his senses....instruments by which we lay hold impressions‚ and these‚ in the child’s case‚ have to become “incarnated”‚ made part of his personality.” The Absorbent Mind‚ Chapter 8‚ p. 84 A child’s journey in life begins as a physical embryo right from the time that he is in his mother’s womb
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STRENGTH OF MATERIAL TENSILE TESTING OF METALS STRENGTH OF MATERIAL TENSILE TESTING OF METALS OBJECTIVE : Tension test is carried out; to obtain the stress-strain diagram‚ to determine the tensile properties and hence to get valuable information about the mechanical behavior and the engineering performance of the material… INTRODUCTION: A tensile test‚ also known as a tension test‚ tests a material’s strength. It’s a mechanical
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SMART MATERIALS 1. Introduction The primary characteristic of a ‘‘smart material’’ is that it has the ability to respond to external stimuli in a technically useful and technically controlled way. The words ‘‘technically useful’’ and ‘‘technically controlled’’ are emphasized since all materials respond to external stimuli of some sort or other (as a simple example‚ all materials respond to temperature by changing their volume)‚ however‚ to be considered a ‘‘smart material’’ the response must
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deflection‚ we will be conducting controlled experiments of various beam materials and sizes and we will also be studying change of properties such as shape deflection and circular bending. This lab experiment report details our practical and theoretical experimentation with graphical aids and reasoning. DESCRIPTION OF THE EXPERIMENT We will set up the required tools and materials to experiment and study the deflection of a cantilever‚ simply supported
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