click below
click below
Normal Size Small Size show me how
7th grade science
Ch 7 bacteria and viruses
Term | Definition |
---|---|
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 |