(i) polyploidy (8 marks) (ii) Artificial selection (4 marks) b) Explain how polyploidy arises in sexually reproducing plants. (5 marks) c) Describe how polyploidy & artificial selection will lead to formation of new species. (8 marks) SENIOR FIVE ORGANIC CHEMISTRY 1.Using suitable examples explain the following terms (a) Mechanism (b) Homolytic fission (c) Heterolytic fission (d) Electrophilic reaction (e) Nucleophilic reaction (f) Addition reaction (g) Elimination reaction (h) Substitution reaction
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Application of Organic Light Emitting Diode (OLED) for Display Systems: Advanced Characteristics and Possible Solutions to Challenges 1. Introduction The first organic light emitting diode (OLED)‚ which was an innovatory of electroluminescence that emits light using organic materials‚ was reported in 1987 (Tang & VanSlyke‚ 1987). OLED displays are constructed by surrounding a glass or plastic substrate with organic compounds that emit light when current passes through them (Askari‚ 2014). Continuous
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The study of pollution by chemicals used in the agricultural methods of today is not only affects the health conditions of the agricultural laborers who work in an agricultural field but also it causes a work related diseases and symptoms to them. Among these chemical pollution Pesticides contribute the majority part in causing these health hazards. These diseases and symptoms are not analyzed by any other calculations or techniques other than fuzzy logic as it mainly concerns with feelings‚ i
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Landscaping service does far better than making your yard look visually attractive. It keeps your lawn healthy and gives your home an efficient green area. If you want to have a well-manicured lawn at home‚ you might want to consider hiring a landscape expert. If you’re in need of a professional landscaper based in [ln]‚ [cn] is the right company to turn to. Throughout our 25 years of experience‚ we have managed to serve countless residents in the locality. Over the course of time‚ we have expanded
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When talking to Brian and Steve about the adequacy of this program for controlling weeds in chicory they were reasonably happy with the results. This is because the application of Preside eliminated a wide spectrum of broadleaf weeds and the cultivation and application of glyphosate managed to eliminate large proportions of the grasses and other problematic perennial weeds. My evaluation of the control program was similar in terms of Preside doing a quality job at eliminating a wide spectrum of
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Why do farmers use drones? When the farmers use drones it helps check if animals are on the land. It it helps spray the chemicals and the drones help check on the crops. A drone does not cost as much money as having to buy a plane and to pay the person who flys the plane would. The drones help check on there animals. Accordiing to the article "Farmer Drones"‚"Roger Johnson is president of the U.S. National Farmers Union. His father used to fly a plane over his ranch in North Dakota to spot
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The message of the book was bringing awareness to balancing nature with mankind and understanding the harmful effects of using synthetic pesticides on the earth. Rachel Carson weaves this message throughout the book by utilizing powerful diction‚ for example‚ “Although modern man seldom remembers the fact‚ he could not exist without the plants that harness the sun’s energy and manufacture the basic foodstuffs he depends upon for life” (63). Carson empowers society by explaining the need for coexistence
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Pesticides are widely used in modern agriculture in order to increase crop yields by inhibiting predation and competition (Berkley). Large corporations have flourished under the demand for more affective pesticides and have in result developed stronger and more effective pesticides. In their race for wealth and influence is it possible that the greater good of man and an outlook for a sustainable future was overlooked? Could these companies have developed products that‚ used abusively will wreak
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Organic Vs. Conventional Grown Food Ever wonder what truly goes in to the food that is produced and sold in our grocery stores. You would be surprised as to what is used to grow the food we eat. Conventionally grown foods can use trace amount of nicotine and arsenic to keep food pest free. Conventionally grown food can be pumped with hormones that allow the crops and animals to grow larger or produce more fruit and vegetables. By using all of the artificial products in conventionally grown
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Purpose: To use indicators to test for the presence of organic compounds in certain substances. Hypothesis: Honey will contain sugars‚ egg white contains proteins‚ corn oil contains lipids‚ oats contains starches and proteins‚ gelatin contains sugars and proteins‚ potatoes contain starch‚ and apple juice contains lipids and sugars. Materials: 9 test tubes Test tube rack Test tube holder Grease pencil Hot plate 20 ml honey solution 20 ml egg white and water mixture 20
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