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Download bacteria - Shore Regional High School
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BACTERIA • Part of the Moneran Kingdom • One celled organism that lacks a nucleus • they do however have nuclear material within the cell wall TRAITS • • • • • • • • • One celled monerans Larger than viruses Live in water, soil, food EVERYWHERE Shapes ROUND, SPIRAL, ROD No nucleus 1 main chronmosome Cell wall Cell membrane Reproduce, grow, carry out cellular respiration MORE TRAITS • • • • • Sticky outer layer Flagellum---whip-like thread Reproduce by fission(asexual) divide into 2 organisms Chromosome parts make a copy of itself then the cell divides • Bacteria need moisture, certain temperature, and food to survive TYPES OF BACTERIA PARASITES AND SAPROPHYTES • Parasites feed on living things • Saprophytes feed on dead material BACTERIA AND DISEASE • • • • • Human diseases caused by bacteria Strep throat Tuberculosis Certain kinds of pneumonia gonorrhea PLANT DISEASES • Fire blight • Crown gall fig. 4-11 pg. 81 Be sure to read pg 82 for Koch’s Postulates COMMUNICABLE DISEASES CAUSED BY BACTERIA • Passed from person to person by • Air • Sneezing, coughing • Pneumonia, strep throat, tuberculosis BACTERIA CAN BE SPREAD • By touching anything that is infected • Clothes, silverware, food drinking water • Sexual contact • Syphilis • Gonorrhea • Insects, cockroaches, flies and mosquitoes HELPFUL BACTERIA Bacteria is needed to decompose dead matter • Bacteria in our stomachs and intestines help make vitamins that we need • To help make linen, rope • Antibiotics which are chemical substances that kill or slow the growth of bacteria BACTERIA AND FOOD • • • • • • • Cottage cheese Swiss chese Sour cream Butter milk Sauerkraut Vinegar yogurt CONTROLLING BACTERIA • High heat (boiling) • Pasteurization(heating milk) • Refrigeration • Freezing (slow growth) • Dehydration take water out of food (noodles, cereal) • Antiseptics kill bacteria on living things and prevents infection • Disinfectants kill bacteria on non-living things
