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Multiplication Video http://www.youtube.com/watch?v=5Xi2Nc1UicQ
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9.2 Bacteria Anthrax Plague Tetanus Staph Lyme Disease MRSA
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A.Bacteria are ______________; living, single-celled organisms! They are carried from place to place in _____, _________, or on the _____________ of objects. Some can move by flicking whip-like _____________. prokaryotes Typical Animal CellTypical Bacterium EukaryoteProkaryote air water surfaces flagella
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1.The genetic material of prokaryotes is not contained in a______________. 2.Prokaryotes have no cell organelles other than _________________. nucleus ribosomes EukaryoteProkaryote
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3. All living things must have food (energy source) to survive. a. __________ - make their own food one of _____ ways: Using the sun’s energy (photosynthesis) Using chemical energy (chemosynthesis) Autotrophstwo
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b. _______________ - consume other organisms. Ex) ______________ HeterotrophsDecomposers cellular respiration Oxygen *** Remember, all living cells do _____________________, which requires ___________.
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B. Bacteria Shapes 1. ________________________ Rod-like (Bacillus)
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2. _________________________Spherical (Coccus)
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3. ________________________Spiral (Spirillus)
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C. Reproduction - Bacteria can reproduce two ways: 1.Asexual reproduction is accomplished through __________ __________. a. One parent divides to produce two _____________ bacteria. This ________ genetic diversity. binary identical fission limits
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2. Sexual reproduction is accomplished through _________________. a. Two parents produce new organisms that _____________ their genes from each parent. This ___________ genetic diversity. conjugation inherit increases
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D. Bacteria and Us – Reasons to be glad bacteria are out there! 1. Oxygen production a. A great deal of Earth’s ___________ is produced by bacteria, and other photosynthesizing autotrophs. oxygen
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2. Natural recyclers a. _________________ are heterotrophic bacteria that break down large chemicals in dead organisms into small chemicals. b. These chemicals are returned to the __________ for other organisms to use. Decomposers soil
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3. Food Production – pasteurization of dairy products. a. _____________________ b. ___________________ c. ____________________d. ____________________ buttercheese yogurtkefir
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4. Your body a. Good bacteria on your body _____________ _____ ___________ with bad bacteria. competeforspace
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b. Good bacteria in your _________________ help digest food.intestines http://player.discoveryeducation.com/index.cfm?guidAssetI d=df103fa0-40ec-4d80-b94a-9c039db80c28
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c. Recall that bacteria are frequently used in __________________. Ex) production of human insulin genetic engineering
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Skin as a Barrier http://player.discoveryeducation.com/index.c fm?guidAssetId=5f74f4b1-347a-49e3- a516-b4f24e6e7e51
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Fun Fact!!! The ____________ toxin produced by bacteria in poorly-preserved canned or jarred food, is used in small doses in __________ injections as a way to temporarily paralyze muscles. botulism botox 5. Bacteria and Disease a. Bacteria that cause disease make up less than ____________ of known bacteria species. one percent
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Dino Disease? http://player.discoveryeducation.com/index.c fm?guidAssetId=abbebdc3-7395-4abc- 9be6-43f3e6fca5b9
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b. Because they are _________, bacteria can be ____________, using _______________. c. Antibiotics are ________ that are typically produced by _________, which have been competing with bacteria on Earth for ______________ of years in the world’s oldest “Arms Race” Ex) Penicillin alivekilled antibiotics toxinsfungi billions
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d. There are drawbacks to using antibiotics: - antibiotics can also kill the ______ bacteria in our bodies - antibiotics can cause unwanted ____________. - over-use of antibiotics can lead to the _____________ of antibiotic-____________ bacteria which can withstand our strongest medicines. good side effects evolution resistant Incorrect antibiotic use kills all but the “strongest bacteria” Ex) MRSA (Methicillin-resistant Staphylococcus-aureus)
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Antibiotic Resistance http://player.discoveryeducation.com/index.c fm?guidAssetId=e852a83c-8149-4d4e- 8181-439511cbc0cd
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Quiz (who was listening? ) Are bacteria alive? Do bacteria cells have a nucleus? What is it called when bacteria reproduce asexually? Are all bacteria harmful? Name one way that bacterial can be helpful: Name one antibiotic: Complete this sentence: –“When antibiotics are used incorrectly, they kill off the weakest bacteria in a sick person, leaving the ____________ ones to survive and reproduce” –http://www.fda.gov/AnimalVeterinary/SafetyHealth/AntimicrobialResista nce/ucm134359.htmhttp://www.fda.gov/AnimalVeterinary/SafetyHealth/AntimicrobialResista nce/ucm134359.htm
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http://www.fda.gov/downloads/AnimalVete rinary/SafetyHealth/AntimicrobialResistanc e/UCM134417.wmvhttp://www.fda.gov/downloads/AnimalVete rinary/SafetyHealth/AntimicrobialResistanc e/UCM134417.wmv
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