equipment (a) A device which gives a truly horizontal level (the Level). (b) A suitably graduated staff for reading vertical heights (the Levelling Staff). Types of levels (a) Tilting – adjustment of level bubble needed before every measurement. (b) Dumpy – adjustment of level bubble needed only once after level set up. (c) Automatic levels – self levelled instruments. Bench Mark and Reference Datum In order to calculate the heights of points a datum is required‚ i.e. a reference level. This is usually
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It is altogether true that Tan is preoccupied with themes of belonging‚ alienation and individuality. Both texts describe the landscape and characters in ways which represent these ideas. They use the landscape of an urban‚ industrialised town to show us how belonging‚ alienation and individuality can happen in different ways. They focus on characters as allegorical figures to show how belonging‚ alienation and individuality are evident in the actions of people. The texts’ central message is that
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The Lincoln–Douglas Debates of 1858 were a series of seven debates between Abraham Lincoln‚ the Republican candidate for Senate in Illinois‚ and the incumbent Senator Stephen Douglas‚ the Democratic Party candidate. At the time‚ U.S. senators were elected by state legislatures‚ in turn Lincoln and Douglas were trying for their respective parties to win control of the Illinois legislature. The debates previewed the issues that Lincoln would face in the aftermath of his victory in the 1860 presidential
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g) After cytokinesis following mitosis h) After cytokinesis following meiosis II 3. How would the answers to the above question change if the question had asked about centromeres and chromatids rather than chromosomes and DNA molecules? 4. The fruit fly Drosophila melanogaster has four pairs of chromosomes‚ whereas the house fly Musca domestica has six pairs of chromosomes. Other things being equal‚ in which species would you expect to see more genetic variation among the progeny of a cross? Explain your answer
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The Rez Sisters The play The Rez Sisters is written by one of Canada’s most celebrated playwrights‚ Tomson Highway. Highway was born in 1951 in northwestern Manitoba. He went on to study at the University of Manitoba and graduated from the University of Western Ontario‚ with honors in Music and English. Native Literature is inspired by “contemporary social problems facing native Canadians today; alcohol and drug abuse‚ suicide‚ wife battering‚ family violence‚ the racism of the
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Mealworms and Caffeine Caffeine is the most commonly used stimulant in the United States. In North America‚ sixty to seventy five percent of caffeine consumption comes from coffee and fifteen percent to thirty percent comes from tea. It can be found in a variety of forms including: coffee‚ tea‚ chocolate‚ soft drinks. Caffeine is a part of a family of drugs known as methylxanthines.To work‚ caffeine disrupts the neurotransmitter adenosine. Caffeine is known to cause physical dependence in humans
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Main article: Evolution of sexual reproduction It is considered that sexual reproduction in eukaryotes first appeared about a billion years ago and evolved within ancestral single-celled eukaryotes.[2] The reason for the initial evolution of sex‚ and the reason(s) it has survived to the present‚ are still matters of debate. Some of the many plausible theories include: that sex creates variation among offspring‚ sex helps in the spread of advantageous traits‚ that sex helps in the removal of disadvantageous
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this society are so innately obsessed with practical outcomes that they have lost all sense of creativity and even conversation for the sake of conversation. Tan illustrates the austerity of this world by depicting it with rigid angles and an overall sepia
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you probably also have gained insights into similarities and differences between species. On the second page of this test‚ arrange the following species into your own phylogenetic tree diagram you believe based on their shared characteristics. (a) Drosophila melanogaster (fruit fly) (b) Ectoedemia castaneae (moth) (c) Hyla cinerea (tree frog) (d) Rattus rattus (rat) (e) Danio rerio (zebrafish) (f) Homo sapiens (human) (g) Saccharomyces cerevisiae (yeast) (h) Lumbricus terrestris (earthworm) (i) Sus
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considered a weed. The flowering plant Arabidopsis thaliana is a important model system to identify genes and determine their functions. In 1964‚ Plant scientists made a prediction that Arabidopsis thaliana would become the botanical equivalent of Drosophila‚ and history has carried out this prediction. Arabidopsis thaliana was the first plant to have its genome sequences. Thaliana has an average length of about 20-30 cm not including the roots‚ and a life span of only 6 to 8 weeks. It is grown in salty
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