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7th grade science

Ch 7 bacteria and viruses

TermDefinition
bacteria microscopic prokaryotes
anaerobic bacteria that do NOT need oxygen to survive
aerobic bacteria that need oxygen to survive
flagella long whip-like structure found on many bacteria
fission cell division that forms two genetically identical cells
conjugation two bacteria of the same species attach to each other and combine their genetic material
endospore forms when a bacterium builds a thick internal wall around its chromosome and part of the cytoplasm
decomposition the breaking down of dead organisms and organic waste
nitrogen fixation the conversion of atmospheric nitrogen into nitrogen compounds that are usable by living things
bioremediation the use of organisms, such as bacteria, to clean up the environmental pollution
pathogen an agent that causes disease
antibiotics medicines that stop the growth and reproduction of bacteria
pasteurization the process of heating food to a temperature that kills most harmful bacteria
virus a strand of DNA or RNA surrounded by a layer of protein that can infect and replicate in a host cell
antibody a protein that can attach to a pathogen and make it useless
vaccine a mixture containing material rom one or more deactivated pathogens, such as viruses
Created by: HOMSSeminar