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Download What kind of impact do bacteria have on the world around you?
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What kind of impact does bacteria have on the world around you? Nitrogen -Fixing Harmful Affects of Bacteria Beneficial Affects of Bacteria Recycling Bacteria Good or Bad? Bioremediation What’s so great about bacteria? • No bacteria = no life = Nitrogen-Fixing Bacteria • Bacteria consume nitrogen from the air and change it into a form that plants can use to grow. I love to take in nitrogen! Nature’s Recyclers • Bacteria breaks down dead organic matter replacing nutrients in the soil. Bioremediation • Bacteria used to combat pollution. • The bacteria change the pollutants into harmless chemicals. Ex. Industrial, agricultural, oil spills, etc. How do humans fight bacteria? Antibiotics! Antibiotics • Are medicines used to kill bacteria and other micro-organisms. • Genetically engineered. Ex. Penicillin Penicillin •One of the first antibiotics; comes from a fungus called penicillium. Alexander Fleming • Scottish • 1929 • Discovered penicillium on agar plates but could not purify it. Florey and Chain • British Scientists • 1939-1945 WWII • Developed penicillin on an industrial scale for the public. • Won the Nobel Peace Prize with Fleming. How does penicillin kill bacteria? • The bacteria lengthen, but cannot divide. Eventually the weak cell wall ruptures http://www.cellsalive.com/pen.htm Other benefits of bacteria… Insulin Food • Engineered bacteria that produce insulin for diabetes. • Scientists put genes carrying genetic code for human insulin into E. coli. The bacteria makes human insulin. • Cheese, yogurt, buttermilk, and sour cream are created by lactic-acid bacteria. • The bacteria digest mild sugar lactose and converts it into lactic acid. (Which preserves and adds flavor) Using the Essential Question for this lesson, write or bullet the answer.
