Notes on Toni Cade Bambara’s "The Lesson" Characters: Sylvia: the narrator and protagonist‚ a sassy‚ defiant African-American girl who resists the educational overtures of Miss Moore. The story’s plot centers on a "teaching moment" or pedagogical breakthrough‚ where Sylvia is disturbed out of her complacency‚ having been exposed to the other side of the social ladder. Sugar: one of Sylvia’s better friends‚ a sidekick if you will. Sugar noticeably picks up on Miss Moore’s lesson faster than
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contrast in color with their surroundings‚ so they are more readily visible. Certain stains can also be used to identify internal structures of the cell‚ which would otherwise be unseen. Further‚ in order to use the oil immersion objective of the microscope and thereby obtain the greatest degree of magnification‚ it is convenient to use stained preparations rather than wet mounts.1 Although bacteria do not appear greatly different from their
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Unit 1: Unit code: QCF Level 3: Credit value: Fundamentals of Science R/502/5536 BTEC National 10 Guided learning hours: 60 Aim and purpose The aim of this unit is to enable learners to develop the practical techniques necessary to pursue a career as a laboratory technician. Learners will investigate the quantities necessary in chemical reactions‚ the structure and functions of cells‚ the calorific value of different fuels and develop skills in communicating scientific information. Unit
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physical status is created from environmental conditions. Parthenogenesis appears to have evolved to let daphnids to obtain more food and temperature. Daphnia develop embryos that are often visible in the female’s body without the assistance of a microscope. These females can start reproducing as early as four days old and in intervals as often as tree days. This means that female daphnia can reproduce up to twenty-five times during her lifetime‚ though usually the number of offspring is far fewer
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Laboratory Research Report 1: Procedures in the Physical Sciences Hebert Duran Strayer University SCI 110‚ Kung Craig P. 29 April 2013 Identify three (3) specific challenges to making direct measurements in the fields of astronomy‚ chemistry‚ physics‚ or earth science. Describe how scientists have utilized indirect forms of measure to overcome these challenges Since the ancient times people have always been attracted to the unknown. Humans have always been curious about everything they
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even Redi continued to believe it occurred under some circumstances. The invention of the microscope encouraged this silly belief. Microscopes revealed a whole new world of organisms that appeared to arise spontaneously. It was quickly learned that to create "animalcules‚" as the organisms were called‚ you needed only to place hay in water and wait a few days before examining your new creations under the microscope. <br> <br>The debate over spontaneous generation continued for
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ABSTRACT In this experiment daphnia magna a semitransparent fresh water crustacean‚ are used to study the effects of water‚ alcohol and caffeine on heart rate. Daphnia was placed on a clean deep well slide. This was placed under the microscope and brought into focus on the best objective and light contrast. The heart rate was observed and counted within 15seconds and recorded on a table. Introduction Daphnia magna is a fresh water ectothermic crustacean commonly referred to as water
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Background Research Scanning Tunneling Microscope; or STM‚ allows scientists to image or display crystalline material surfaces down to an atomic level. Basically; it shows the formation of surface atoms on conducting and semi-conducting materials such as metals‚ or metalloids. First invented by Gerd Binnig and Heinrich Rohrer in 1981; the Scanning Tunneling Microscope used quantum tunneling to extract atomically resolved images to understand the morphology of crystalline surfaces including both
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BIOLOGY 1406 REVIEW FOR EXAM II Chapter 6: A Tour of the Cell I. The microscope A. Differences between light microscope‚ scanning and transmission electron microscope B. Relationship between magnification‚ resolution and contrast II. Compare and contrast prokaryotic and eukaryotic cells III. Know parts of the cells‚ their structure and function A. The nucleus B. Ribosomes C. Endomembrane system 1. Nuclear envelope 2. Endoplasmic reticulum (ER) a. Rough ER-has
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atmosphere is immediately attracted to it’s surface and begins it’s diffusion into the glass. The process of hydration continues until the fresh obsidian surface contains 3.5 percent of water‚ the saturation point of the process. To be observed under a microscope‚ the results of the hydration must be identified into thin sections out normal to the surface. A diffusion front can be recognized by a change of the inner edge of the hydration rind‚ which is refractive index. These rinds of hydration are more
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