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Microscopes Defending Against Infection Bacterial Classification Characteristics of Bacteria Bacterial Reproduction & Roles Bacterial Nutrition $100 $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500 $500
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3 shapes that bacteria can be classified by
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What is bacilli, cocci, spirilla?
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Term for the arrangement into pairs
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What is diplo?
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Bacteria that stain violet when exposed to gram stain
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What is Gram positive bacteria?
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Difference between strepto & staphylo
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What is strepto is arranged in chains & staphylo is arranged in clusters?
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Explains why gram – bacteria is the colour it is
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What is the thinner cell wall due to less peptidoglycan?
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Original name for the Kingdom that included all bacteria
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What is Monera?
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What differentiates Eubacteria from Archaebacteria
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What is peptidoglycan in the cell walls & habitat?
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Term given to organisms that lack a nucleus & membrane-bound organelles
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What is prokaryotic?
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? ?
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What is pili & ribosome?
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Dormant structure made by bacteria when environmental conditions become harsh
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What is an endospore?
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Objective lens you would use to scan for your specimen because it gives you the largest field of view.
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What is the low objective lens?
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The power that has the least depth of field.
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What is the highest power?
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This type of microscope uses beams of electrons to create 3D images of a specimen’s surface.
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What is the scanning electron microscope (SEM)?
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Daily Double!!
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This is how our lab microscopes are similar and different from simple microscopes.
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What is they both use light & lenses but our microscopes use 2 lenses so are more powerful?
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Differences between SEM and TEM.
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(transmission electron microscope) (scanning electron microscope)
TEM (transmission electron microscope) SEM (scanning electron microscope) magnifies X does NOT magnify as much as TEM examines INSIDE a specimen examines OUTSIDE a specimen must use VERY thin sections thickness does NOT matter images in 2D images in 3D
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A drug or natural compound that can kill or inhibit bacterial growth
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What is antibiotics?
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3 ways to defend against bacterial infections.
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What are prevention (wash hands, sanitation, etc
What are prevention (wash hands, sanitation, etc.), food preservation, and antibiotics?
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Methods of using heat or chemicals to slow down/stop bacterial growth.
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What is sterilization, refrigeration, cooking, canning, pickling, freezing, drying?
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Antibacterial agent that cleans surfaces but is not safe to apply to skin.
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What are disinfectants?
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Three examples of bacterial diseases.
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What are strep throat, salmonella,ear infections, tooth decay, etc. ?
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Bacteria that can’t make their own food so must injest/absorb nutrients.
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What are heterotrophic bacteria?
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Bacteria that feed on dead and decaying material
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What are saprophytes?
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Bacteria that are killed by oxygen
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What are obligate anaerobes?
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Bacteria that can live with or without oxygen
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What are facultative anaerobes?
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Method bacteria uses to release energy aerobically versus anaerobically
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What cellular respiration (aerobic) & fermentation (anaerobic)?
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Difference between asexual & sexual reproduction
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What is asexual reproduction generates offspring that are genetically identical to a single parent & in sexual reproduction, two parents contribute genetic information to produce an offspring with genetic variation?
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Sexual reproduction (genetic exchange) in which bacteria exchange genetic material
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What is conjugation?
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Asexual reproduction of bacteria
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What is binary fission?
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Ecological roles of bacteria
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What is producers, decomposers, nitrogen fixation?
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Human uses of bacteria
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What is production of food/beverages, sewage treatment, clean up oil spills, genetic engineering, production of vitamins
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Final Jeopardy
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Bacteria and and the Microscope
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If 100 bacteria fit across the oil immersion field of view, this is the size of one bacterium.
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What is approx. 1.8 micrometers (180÷100)?
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