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Definitions (1002)
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Bacillus
a rod-shaped bacterium
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back emf
the voltage that is produced in a circuit because of a changing current
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Background radiation
the nuclear radiation that arises naturally from cosmic rays and from radioactive isotopes in the soil and air
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Bacteria
in a modern taxonomic system, a domain made up of prokaryotes that usually have a cell wall and that usually reproduce by cell division; this domain aligns with the traditional kingdom Eubacteria
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Bacteria
in a modern taxonomic system, a domain made up of prokaryotes that usually have a cell wall and that usually reproduce by cell division; this domain aligns with the traditional kingdom Eubacteria
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Bacteria
extremely small, single-celled organisms that usually have a cell wall and that usually reproduce by cell division (singular, bacterium)
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Bacteria
extremely small, single-celled organisms that usually have a cell wall and that usually reproduce by cell division (singular, bacterium)
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bacteriophage
a virus that infects bacteria
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baleen
the horny plates that hang from the mouth of some whales; used to filter out water but to retain solids when whales feed
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Ball-and-socket joint
a joint in which the head of one bone is inserted into a hollow in another bone; examples include the hip and the shoulder
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