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Bacteria Christopherson
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Wake-up 1.Why are viruses not considered to be living? 1.What is a prokaryotic organism?
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Pay attention to your classmates PowerPoint presentations to fill in the chart at the top of your notes.
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Prokaryotic Cell Definition Simple cells that lack “membrane- bound” organelles. “Membrane- bound” means that they have an outer layer.
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Label the diagram of the Prokaryotic cell in the basket Write the following on the provided notecards and match them to the appropriate structure in the diagram. CytoplasmCell Membrane CapsulePili FlagellaCell Wall RibosomesPlasmid DNA
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Bacteria Structure
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Bacterial Shapes: Bacillus Rod
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Bacterial Shapes: Spirillum Spiral
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Bacterial Shapes: Coccus Round
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What Shape? Bacillus
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What Shape? Coccus
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Spirillum
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Bacillus Spirillum Coccus
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Feeding habits of Bacteria: Autotroph Producer; an organism that makes glucose (food) Photosynthesis
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Where does photosynthesis take place in the majority of producers? Chloroplast
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Where are the chloroplasts in Prokaryotic cells????
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Autotroph #1: Photosynthesis Bacteria do NOT have chloroplasts, but have chlorophyll which allows them to go through photosynthesis
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What is the summative equation for Photosynthesis? Water+ Glucose + Oxygen Sunlight Energy Carbon dioxide Reactants What is needed Products What is produced
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Example Autotroph: Cyanobacteria Better known as “Blue-Green Algae” Fossils, more than 3.5 billion years old, have been found of cyanobacteria (The oldest known fossils)
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One of the largest groups of bacteria The first of organisms to group to produce oxygen into the atmosphere
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Autotroph #2: Chemosynthesis Process in which Bacteria make glucose in the absence of sunlight They use CO 2 and chemicals in their environment to make glucose
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Chemosynthesis takes place in the Deep Sea Thermal vents at the bottom of the ocean. The first one was discovered off the coast of the Galapagos in 1977. It was about 1.5 miles/8000 feet deep
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Plant Earth Video Clip (24:15)
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What is an Heterotroph? Consumer; an organism that cannot make glucose (food); they need to consumer others
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Heterotroph #1: Parasitic Bacteria feeds off of the host Bacteria benefits; host is harmed
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Example: Streptococcus Streptococcus pneumoniae causes strep throat, meningitis, and pneumonia Transmission:Direct contact
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Heterotroph: Mutualistic Bacteria and the host benefit from each other If one were to die, the other would suffer or eventually die
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Example: E. coli Escherichia coli (a.k.a. E. coli) lives in the gut, where it helps digest food and produces Vitamin K. The "bad" strain of E. coli O157:H7 causes severe food borne sickness.
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Example: Lactobacillus bulgaricus Lactobacillus bulgaricus helps turn milk into cheese, yogurt, and other dairy products
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Heterotroph #3: Saprophytic AKA Decomposer Consumes dead organic matter
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Example: Micrococcus
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Binary fission: Asexual
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Reproduction in unicellular organisms by division into two daughter cells What is Binary Fission?
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*How fast does this occur?
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Conjugation: Sexual Reproduction
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The process by which genetic material is transferred from one bacteria cell to another by a sex pilus What is Conjugation?
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