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4,606 Essays on Science. Documents 4,591 - 4,606

  • Xyy Syndrome

    Xyy Syndrome

    XYY Syndrome XYY Syndrome is a rare genetic disorder which affects males due to an extra Y chromosome. Healthy males have 46 chromosomes including one X and one Y chromosome. Men with XYY syndrome have 47 chromosomes, two of which are Y chromosomes. It is not known why the extra Y chromosome occurs. The disorder is present at birth and is estimated to occur in one out of every one thousand live births. In very

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    Essay Length: 470 Words / 2 Pages
    Submitted: December 23, 2009 By: Jessica
  • Xyy Syndrome

    Xyy Syndrome

    XYY Syndrome is a rare genetic disorder which affects males due to an extra Y chromosome. Healthy males have 46 chromosomes including one X and one Y chromosome. Men with XYY syndrome have 47 chromosomes, two of which are Y chromosomes. It is not known why the extra Y chromosome occurs. The disorder is present at birth and is estimated to occur in one out of every one thousand live births. In very rare instances,

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    Essay Length: 400 Words / 2 Pages
    Submitted: March 19, 2010 By: Steve
  • Xyy Syndrome

    Xyy Syndrome

    XYY Syndrome is a rare genetic disorder which affects males due to an extra Y chromosome. Healthy males have 46 chromosomes including one X and one Y chromosome. Men with XYY syndrome have 47 chromosomes, two of which are Y chromosomes. It is not known why the extra Y chromosome occurs. The disorder is present at birth and is estimated to occur in one out of every one thousand live births. In very rare instances,

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    Essay Length: 391 Words / 2 Pages
    Submitted: May 23, 2010 By: Steve
  • Yak Lab

    Yak Lab

    Yak Lab Natural selection is the process by which favorable heritable traits become more common in successive generations of a population of reproducing organisms, and unfavorable heritable traits become less common. Natural selection acts on the phenotype, or the observable characteristics of an organism, such that individuals with favorable phenotypes are more likely to survive and reproduce than those with less favorable phenotypes. If all the offspring that organisms can produce were to survive and

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    Essay Length: 612 Words / 3 Pages
    Submitted: January 18, 2010 By: Mike
  • Yeast

    Yeast

    Purpose: Respiration is an important part of the global carbon cycle. To get energy, organisms (plants, bacteria, animals, yeast, etc.) respire. That means they internally burn sugars back into carbon dioxide gas which is then released into the atmosphere. We can use yeast to experiment with and explore this process. Human activities that change conditions in the air, water and land affect other organisms. We can add different chemicals to the yeast and determine what

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    Essay Length: 1,070 Words / 5 Pages
    Submitted: December 8, 2009 By: Vika
  • Yeast Respiration

    Yeast Respiration

    Biology-Respiration-Rate of Yeast Respiration Aim: An investigation to find out how temperature affects the rate of yeast respiration. Variables: Fixed variables: Through out the investigation I will keep the amount of yeast/glucose solution the same (50 ml). Also the amount of time I will run the experiment for at each reading will remain constant at 1 minute. The one other thing I will keep the same is the concentration of the Glucose as we are

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    Essay Length: 2,285 Words / 10 Pages
    Submitted: December 21, 2009 By: Mike
  • Yersinia Pestis - the Bubonic Plague Epidemic

    Yersinia Pestis - the Bubonic Plague Epidemic

    Yersinia pestis: “The Bubonic Plague Epidemic” The bubonic plague (also known as the “Black Death”) is one of the deadliest epidemics, eventually turning pandemic, in human history. The bubonic plague began in Europe around 1347 and lasted until 1353. The result of this epidemic killed more than 25 million people. At the time, this was more than a quarter of Europe’s population. The pathogen causing this deadly, historic disease is known as Yersinia pestis. Y.

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    Essay Length: 650 Words / 3 Pages
    Submitted: November 13, 2009 By: David
  • Yield Lab

    Yield Lab

    Abstract: All the materials were measured and weighed. It was found in the experiment that the yield of copper hydroxide in 40%. Introduction: The copper (II) sulphate is then placed in 100 mL of distilled water. Then 20 mL of CuSO4 is measured and placed 100 mL of distilled water. This can later be weighed to determine the mol of CuSO4 and the mol/L concentration. Then this was used to find out how many mL

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    Essay Length: 908 Words / 4 Pages
    Submitted: January 22, 2010 By: Wendy
  • Yoke Mechaism

    Yoke Mechaism

    Background of Study In this laboratory we will investigate the kinematics of some simple mechanisms used to convert rotary motion into oscillating linear motion and vice-versa. Pure simple harmonic motion is produced by the Scotch Yoke mechanism when driven by an eccentric or crank. Scotch Yoke takes a revolution per minute per minute and converts it to a linear velocity. It can be shown that: X = r ( 1 – cos ) By differentiation:

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    Essay Length: 488 Words / 2 Pages
    Submitted: April 19, 2015 By: siong188
  • You Can Make a Difference in Preventing Marine Engine Pollution

    You Can Make a Difference in Preventing Marine Engine Pollution

    You Can Make a Difference In Preventing Marine Engine Pollution Currently 12 million marine engines are operated in the United States. These marine engines are among the highest contributors of hydrocarbons (HC) and oxides of nitrogen (NOx) emissions in many areas of the country. HC and NOx produce ground-level ozone, which irritates the respiratory system causing chest pain and lung inflammation. Ozone can also aggravate existing respiratory conditions such as asthma. Boaters can join many

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    Essay Length: 4,115 Words / 17 Pages
    Submitted: May 22, 2010 By: Tommy
  • Zebra Fish and the Affect of Uv Light on Their Development

    Zebra Fish and the Affect of Uv Light on Their Development

    Zebra Fish and the Affect of UV Light on their Development The zebra fish are small striped fish that usually develop in about a week. They begin as a single cell embryo to a multi-cellular organism. In an experiment I tested how UV light would effect the development of the zebra fish. My hypothesis is that with the UV light on them they would increase development. In the beginning of the experiment there were three

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    Essay Length: 745 Words / 3 Pages
    Submitted: December 5, 2009 By: Kevin
  • Zinc Oxide

    Zinc Oxide

    Zinc oxide in a mixture with a about 0.5% iron(III) oxide (Fe2O3) is called calamine and is used in calamine lotion. There are also two minerals, smithsonite and hemimorphite, which have been called calamine historically (see: calamine (mineral). Zinc peroxide, ZnO2 .Ѕ H2O, is a white to yellow powder that is used in antiseptic ointments. Zinc white is used as a pigment in paints and is more opaque than lithopone, but less opaque than titanium

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    Essay Length: 392 Words / 2 Pages
    Submitted: January 14, 2010 By: Andrew
  • Zoology

    Zoology

    Zoology We​ ​live​ ​in​ ​a​ ​world​ ​full​ ​of​ ​varieties​ ​in​ ​Life​ ​Science.​ ​This​ ​is​ ​what​ ​makes​ ​us​ ​complex​ ​to​ ​this day.​ ​I​ ​decided​ ​to​ ​write​ ​about​ ​the​ ​Life​ ​Science​ ​of​ ​Zoology,​ ​which​ ​is​ ​the​ ​study​ ​of​ ​biology​ ​dealing with​ ​animals.​ ​In​ ​other​ ​words​ ​it​ ​can​ ​also​ ​be​ ​described​ ​as​ ​the​ ​science​ ​of​ ​animal​ ​life.​ ​It​ ​is​ ​the teaching​ ​of​ ​involving​ ​research​ ​of​ ​the​ ​animal​ ​kingdom​ ​and​ ​life.​ ​It​ ​shows​ ​us​ ​the​ ​behavior, characteristics,​ ​anatomy​ ​and​

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    Essay Length: 452 Words / 2 Pages
    Submitted: November 22, 2017 By: z2580
  • Сhildrеn Physiсаl Асtivity and Оbеsity in Qatar

    Сhildrеn Physiсаl Асtivity and Оbеsity in Qatar

    Сhildrеn Physiсаl Асtivity and Оbеsity in Qatar Student’s Name Institution Course Instructor’s Name Date The fast developing countries in the world are faced with a great problem. The problem, although may appear to have far-fetched evidence is real. It is related to the reduced levels of children physical activity in these countries. The escalating rates of obesity and overweight in the developing countries in the last twenty-five years has been alarming. The trend, previously

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    Essay Length: 1,366 Words / 6 Pages
    Submitted: September 3, 2014 By: edwin
  • “caregiving Provides the Morale and Wellness of the Elderly “

    “caregiving Provides the Morale and Wellness of the Elderly “

    Introduction: Caregiving among the adult population is a popular trend in the twenty-first century. Now that aging population is increasing in its proportion family members entrust their elder’s the caregivers. Since part of the caregiver’s task is to take account the elder’s morale and well-being. In becoming an effective caregiver one should be knowledgeable, patient and compassionate. They should also assume the role of being a healthcare provider as well as to become the emotional

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    Essay Length: 2,076 Words / 9 Pages
    Submitted: November 17, 2009 By: Jessica
  • “surely You're Joking Mr.Feynman...”

    “surely You're Joking Mr.Feynman...”

    It is hard not to enjoy this author. Richard Feynman is an extremely curious character with a lot of time on his hands. He obviously loved to explore the science world as an art. He won the Nobel Prize in 1965 for physics and was one of the greatest physicists of all time. Within the few chapters and pages that I have read, Richard Feynman was definitely a man with a huge sense of adventure

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    Essay Length: 1,208 Words / 5 Pages
    Submitted: December 30, 2009 By: Wendy
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