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Download Microorganism-notes-key-2015
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Name _____________________________________ Microorganisms “Micro” means extremely small “Organism” means living thing So, microorganism means extremely small living thing Microorganisms can be both helpful and harmful Helpful Microorganism Bacteria helps us digest food bacteria Bacteria can turn milk into yogurt and cheese Fungi helps decompose things that have died fungi Yeast is a fungus that makes bread rise Harmful Staph, strep, salmonella, and E. coli bacteria can cause infections, such as strep throat and food poisoning. Harmful fungi can kill crops, rot wood, spoil food, and cause skin diseases like athlete’s foot Penicillin is a medicine made by a mold (mold is a fungus) protists Most protists are not helpful or harmful, but some protists can help break down soil Red algae, a protist, can kill fish Viruses cause many illnesses, such as colds, flu, chicken pox. viruses other Protists can cause diseases such as malaria no helpful viruses Phytoplankton - single cell organisms from the plant kingdom that create most of our oxygen and provide food for fish Microorganisms are often one-celled and have different ways of moving, such as: Some are lined with hair-like cilia that they use to move. Some have one or more flagella, that they use like a whip to move.
