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Published bySolomon Simmons Modified over 9 years ago
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The two kingdoms of bacteria: Archaebacteria & Eubacteria
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What type of cells? Prokaryotes: cells do not have a nucleus Eukaryotes: cells have a nucleus All bacteria are prokaryotes.
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How many cells? All bacteria are unicellular.
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How do they reproduce? Binary fission: simple cell division in which one cell splits into two Is this sexual or asexual reproduction?
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What shapes are bacteria? Most bacteria have a cell wall that determines the shape of the bacteria. There are three main shapes of bacteria:
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Shapes Bacilli
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What are eubacteria? Consumers: obtain energy from other organisms –Decomposers: get energy from dead organisms –Parasites: invade other cells to obtain food Producers: make their own food –Some use photosynthesis
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What are archaebacteria? Live in places with very harsh conditions. Three kinds: –Methane makers: excrete methane and are found in swamps –Heat lovers: live in places of very high temperature such as ocean vents –Salt lovers: live in places of very high salt concentration such as the Dead Sea
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Bellringer How do bacteria reproduce? Binary fission
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Bacteria Prokaryotes (no nucleus) Unicellular Reproduce asexually (binary fission) Three shapes: spirillia,cocci, and bacilli
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Bacteria in the world The good, the bad, and the ugly.
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The Good…for the environment Bacteria are essential to the environment. They take nitrogen out of the air and turn it into a form that can be used by plants in a process called nitrogen fixation. Decomposing bacteria break down dead things and recycle those nutrients so that they are available to other organisms.
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The Good… for people Bacteria have been manipulated to produce antibiotics to fight different bacteria. Bacteria have been manipulated to produce other drugs such as insulin.
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The Good…for people Bacteria are used in dairy processing to add flavor and add preservatives.
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The Bad Strep throat Pneumonia Tuberculosis Leprosy Bubonic plague Food poisoning Anthrax
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