HIV/AIDS treatment‚ policy‚ research‚ epidemiology‚ and prevention from the University of California‚ San Francisco. hivinsite.ucsf.edu/ HIV & AIDS Virus AIDS - acquired immunodeficiency syndrome - was first reported in the United States in 1981 and has since become a major worldwide epidemic. AIDS is caused by the human immunodeficiency virus (HIV). By killing or damaging cells of the body’s immune system‚ HIV progressively destroys the body’s ability to fight infections and certain cancers
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inadequate health system and poor infrastructure. The Ebola virus‚ discovered in 1976‚ along a river in the Democratic Republic of Congo‚ recently started appearing
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Effects of Crossing Over in Sordaria fimicola Abstract Sexual reproduction in organisms is a cause for genetic variation. This can be seen through the process of meiosis in Sordaria fimicola because of the effects of crossing over and independent assortment that occur in meiosis I. Before performing this experiment we hypothesized that we would be able to see that crossing over did indeed occur in the S. fimicola. We tested our hypothesis by growing our own culture and observing it under a
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Biology Research Task- Lucy Kerslake What causes antibiotic resistance? Antibiotic resistance occurs when an antibiotic is no longer effective against a particular bacteria‚ making that organism resistant to the effects of the antibiotic. Bacteria become resistant due to selective pressure. Those organisms which resist the antibiotic‚ and do not die from it ’s effects have a greater chance of survival within the host‚ therefore allowing them to reproduce and spread it ’s resistance to other
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What is a genetically modified organism? A genetically modified organism (GMO) is an organism whose genetic material has been altered using techniques in genetics generally known as recombinant DNA technology. Viruses‚ bacteria‚ fungi‚ plants‚ and animals are all examples of organisms that have been engineered so that they contain genes from at least on unrelated organism. To create a genetically modified organism a molecule from a different source are combined into another molecule to create
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CU254 – Causes And Spread Of Infection. Learning Outcome 1: Infection | | Characteristics | Illnesses Caused | | | | | Bacteria | | * Unicellular. * Found in almost all kinds of habitats. | * Impetigo. * Salmonella. *Tuberculosis. | Viruses | | * Tiny organisms. * Composed of DNA and protein. | * Attach themselves to other organisms. * Aids/HIV. * Chicken Pox. * Colds/Flu. | Fungi | | * Plants. * Contains chitis instead of cellulose. * Used for food production. | * In
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DISEASE PREVENTION AND CONTROL DISEASE A disease is an abnormal condition that affects the body of an organism. It is often construed as a medical condition associated with specific symptoms and signs. It may be caused by factors originally from an external source‚ such as infectious disease. “Disease" is often used more broadly to refer to any condition that causes pain‚ dysfunction‚ distress‚ soci al problems‚ or death to the person afflicted‚ or similar problems for those in contact
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Unit 22 Causes and spread of infection 1.1 Identify the differences between bacteria‚ viruses‚ fungi and parasites. · Bacteria- Are one cell microorganisms with a simple cellular orgaization who necleus lacks a menbrane. · Viruses- peices of nucleic acid (DNA or RNA) wrapped in a thin coat of protein that replicate only within the cells of living hosts. · Parasites- can be protazoa‚ yeasts or multicellular organisms such
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Invasive plants: approaches and predictions I chose this topic because I want to know what is being done about the invasive plants and on our earth and how people have come up with ideas to prevent invasive plants . I have also chosen this topic just for my own knowledge. Aim: To determine if improving management as well as continuous effort will be needed to stop invaders. Hypothesis: it was expected that good management and continuous effort would be needed to stop any invaders. The source
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temperature dropped rapidly so that crops failed. In the 1340s‚ the plague began to extend to many places. The plague was shrouding these places‚ everyone got panic. Even though the city decided to stop people outside came in‚ it still couldn’t stop the virus spreading. Cause we know that Yersinia pestis bacteria are transmitted from rats to humans‚ rats and other animals always can come into any places. As conditions worsen‚ some priests refused to do something for dead people like baptize them. There
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