Prokaryotes: No true nucleus Small and simple Unicelled No true mitochandrias or chloroplasts
Archaea: Has cell wall that doesn't contain peptidoglycan Live in extreme conditions
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Eukaryotes: True nucleus Large and complex Multicelled True mitochandrias or chloroplasts
Eubacteria: Has cell wall that does contain peptidoglycan Ecologically diverse |
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 ap-bio-patrick-steed.wikispaces.com
Viruses and Bacteria: Viruses are not considered living organisms. They cause diseases by directly destroying living cells or by affecting cellular processes in ways that upset homeostasis. Best way to prevent a viral disease is a vaccine. Bacteria cause diseases by destroying living cells or by releasing chemicals that upset homeostasis. People can control bacteria by using disinfectants, proper food storage and food processing, and sterilization by heat. Vaccines (preparation of weakened or killed pathogens that stimulates the body's immune system) can be used to prevent both diseases, while antibiotics (block growth and reproduction of bacteria) are only effective in treating bacterial diseases. Prokaryotes: Are producers at the bottom of the food chain, they decompose and return nutrients back to soil and supply raw materials, they also take nitrogen from the air and convert it into ammonia to put back into the soil for plants. They are used in food such as yogurt and cheeses, they synthesis drugs and chemicals through genetic engineering, and they digest petroleum and remove human-made waste products from water. Emerging diseases: Emerging diseases are diseases that are well known and suddenly become harder to control or an unknown disease that appears in a population for the first time. They are dangerous to human health because human populations have not yet developed methods of control and because humans have no resistance to them. Examples of emerging diseases would be E. coli, West Nile Virus, and MRSA. Some factors that have led to emerging diseases would be: Widespread usage of antibiotics leading to a process of natural selection that favors resistance to powerful drugs, viruses replicating quickly, sometimes allowing a virus to jump from on host to another, changes in lifestyle and commerce, and short time between successive generations of pathogens allowing them to evolve rapidly.  confessionsofacancerpatient.blogspot.com |
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