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BACTERIA Friend Or Foe? 3 main shapes of bacteria: Round = coccus diplococcus Rod = bacillus Spiral = spirilla streptococcus REPRODUCTION Binary Fission splits into 2 new Conjugation exchange of genetic material CLASSIFICATION All bacteria used to be classified under KINGDOM MONERA Now they have been divided into two kingdoms: ARCHAEBACTERIA Prokaryotes (NO nucleus) Cell walls w/out Peptidoglycan genes/DNA similar to eukaryotes (!) *live in EXTREME environments such as. . . EUBACTERIA Prokaryotes (no nucleus) more of these live everywhere cell wall contains Peptidoglycan Found in . . . 1 Animal-Like 5 8 Plant-Like 10 •Range in size from microscopic to seaweeds hundreds of feet in length Single celled algae Volvox Chlamydomonas 11 12 Multicellular 13 Diatoms 16 Fungi-Like 17 water molds Slime molds •Feed by absorption- -break down dead organic matter •May be saprophytes or parasites 18 •Make a reproductive structure or fruiting body that produces spores •Often found on decaying wood or leaves water molds •Aquatic water molds are parasites on fish forming furry growths on their gills •May act as decomposers in water of dead plants & animals •May be pathogenic to plants 19 Algae are a source of food in the aquatic ecosystem and produce oxygen clip African sleeping Sickness Sushi 22 Plant Pathogen Sometimes used in ice cream, pudding and soups. Protista Malaria Termite Guts Red Tides Chemical derived from algae can be used to treat stomach ulcers