* Chapter 25 * Evolution has to work with existing forms * Heterochrony Evolutionary change in rate or timing of developmental events * Padomorphosis Mature state of an organism retains juvenile characteristics Spatial Patterns Rearranges structural features through changes in gene expression or gene duplications. Homeotic genes control 3-D patterns of multicellular organisms Hox gene family: HoxC6 expressed (no limbs), HoxC6 not expressed (limbs can form) Jellyfish to
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agent (pathogen) that causes this infectious disease? For example, describe the name of the bacteria, virus, or parasite. Staphylococcus is a group of bacteria that can cause a number of diseases as a result of infection of various tissues of the body. Staphylococcus is also known as staph, which is pronounced “staff”. Its illness can range from mild and requiring no treatment to severe and fatal. The bacteria look like a bunch of grapes or little red berries. There are over 30 types of staphylococcus
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Questionnaire SCI/162 Principles of Health and Wellness April 20, 2012 Write a 125- to 150-word response to each of the following questions: • What is the infectious agent (pathogen) that causes this infectious disease? For example, the name of the bacteria, virus, or parasite. Salmonella is a type of food poisoning caused by eating foods that are contaminated with Salmonella. Salmonellosis is caused by the Salmonella bacterium. There are a few different types of this bacterium, but the two different
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“blood poisoning,” growth of a pathogenic microorganism in the blood (non-specific term) * Bacteremia- bacteria in the blood * Toxemia- presence of toxin in the blood * Viremia- in the blood * Q: Do we all have the same resident flora? A: Bacteria from our skin remains on the things we touch and could be used for the same purpose as fingerprints. Own personal bacteria can stay on things we touch for days or even weeks at a room temperature if left untouched. Dislodged
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through food or water, more through direct person-to-person contact. It can be transmitted through food by improper food handling and poor hygiene of food handlers. Staph is a common hospital infection due to health care providers being carriers of the bacteria, can be easily contaminated by contact with nose. Skin-to-skin is the most significant mode of transmission. What is an example of a real life outbreak of this foodborne illness in the United States? A real life outbreak of foodborne staph happened
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Salmonella is a group of bacteria that cause typhoid fever, food poisoning, gastroenteritis, enteric fever and other illnesses. People become infected mostly through contaminated water or foods, especially meat, poultry and eggs. Salmonella is a gram-negative, rod-shaped bacilli that can cause diarrheal illness in humans. Put simply, Salmonella is a bacterium shaped like a rod with a cell wall composed of peptidoglycan. There are many different kinds of these bacteria. Salmonella serotype Typhimurium
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best diagnosis of this case? From my research on the signs and symptoms that this patient presented I would diagnose her with Lyme’s disease. 2. What features are critical to your diagnosis? Lyme’s disease is a bacterial infection caused by bacteria called Borrelia Burgdorferi. This is a bacterium that is carried by ticks. The patient has all of the signs and symptoms of this disease. Prior to the onset of symptoms she was in the wilderness in Wisconsin where she said there were a large number
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strain of Streptococcus pneumoniae was exposed to a heat-killed pathogenic strain of the same bacteria. Griffith observed that although the virulent strain had been heat-killed; the DNA was able to survive the heating process and was taken up by the “resistant” strain of bacteria through gene transformation. In this lab, an experiment was conducted to test the hypothesis that a susceptible strain of bacteria, known as the S-strain, will grow in the presence of an antibiotic if it is combined with the
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as well) = Obtain energy and nutrients from waste or dead organisms. Ex: Fungi and Bacteria Life maintains Internal Consistency (Homeostasis) * Homeostasis is the process by which a cell or organism maintains a state of internal consistency, or equilibrium. Reproduction in 2 ways * Asexual reproduction = genetic information that only comes from one parent and all offspring are identical Ex: Bacteria and most
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