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Published byLucas Hunt Modified over 9 years ago
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Bacteria
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VERY SMALL Tip of sewing needle covered in bacteria
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Bacteria Found everywhere there is water Plaque on tooth with toothbrush bristles
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Diversity of Prokaryotes Bacteria are prokaryotes Prokaryotes make up two domains –Bacteria (eubacteria) –Archaea (archaebacteria). Staphylococcus bacteria on hair follicle
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Archeabacteria “ancient” bacteria Unique cell walls and ribosomes most live in harsh environments Salty shallow tide pools Deep sea ventsHot springs
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Eubacteria "true" bacteria largest kingdom have cell wall, some with flagella many live in soil or water some cause disease, decomposition some are photosynthetic Salmonella invading human cells
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Photosynthetic Eubacteria Cyanobacteria (blue green algea)
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Structure E. coli
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Identifying Prokaryotes Spherical shape = Cocci
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Identifying Prokaryotes Rod-shaped = Bacilli
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Identifying Prokaryotes Spiral shape = Spirochetes http://www.youtube.com/watch?v=i7BV4IOVKyg&feature=related
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Cell Walls
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Gram Negative Gram Positive
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Movement Flagella help prokaryotes to move toward materials that they need to survive.
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http://www.youtube.com/watch?v=J6akNYlke hY&feature=related bacteria re-cap http://www.youtube.com/watch?v=J6akNYlke hY&feature=related http://www.youtube.com/watch?v=tqOVYpkZ 0qs bacteria song http://www.youtube.com/watch?v=tqOVYpkZ 0qs http://www.youtube.com/watch?v=JnlULOjUh SQ&feature=related white blood cell chase http://www.youtube.com/watch?v=JnlULOjUh SQ&feature=related
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Diplo: in pairs (diplococcus) Diplococcus pneumoniae Arrangement
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Diplo: in pairs (diplococcus) Bacillus anthracis Arrangement
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Strepto: in long chains Streptococcus pyogenes Arrangement
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Staphylo - in clusters Staphylococcus aureus Arrangement
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Autotrophs – self-feeders Photosynthetic – Light energy Chemosynthetic – obtain energy from hydrogen gas, hydrogen sulfide, or ammonia Metabolism of Prokaryotes
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Heterotrophs “Feed off of others” Saprophytes – Feeds off dead things (decomposers) Parasites – Feed off living things (cause disease)
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Heterotrophs Leprosy
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WHAT?!?! Clostridium botulinum “Botulism”
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Aerobes – require oxygen Anaerobes – Don’t need oxygen Respiration Tetanus Flesh eating bacteria
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Reproduction and Growth Under optimum conditions – divide ever 20 minutes Binary Fission – Asexual reproduction – Simple Cell Division
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Conjugation Two cells exchange DNA through a protein bridge E. coli Recipient Donor
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Endospores Dormant state that helps bacteria survive unfavorable conditions Clostridium botulinum
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Importance of Bacteria Benefits to humans – Food Processing – dairy products (cheese, cream cheese, yogurt, etc.) – pickles, sauerkraut, vinegar
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Sewage Treatment Plant Bacteria break down waste
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Sewage Treatment Plant Bacteria break down waste
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Medicine Used to make antibiotics, insulin, other products Inhibition of fungal growth Bacillus colony
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