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Living Things
Chapter 1
Term | Definition |
---|---|
Organisms | any living things |
cell | the basic structure of an organism |
unicellular | a single cell organism |
multicellular | an organism with many cells |
stimulus | a change in an organisms surroundings that causes the organism to react |
response | a change in behavior |
spontaneous generation | the false idea that living things can come from non-living things |
controlled experiment | an experiment where all of the factors are the same except for one factor |
autotroph | organisms that can make their own food |
heterotroph | organisms that cannot make their own food |
homeostasis | maintenance of stable internal conditions |
classification | the process of grouping things based on their similarities |
taxonomy | the scientific study of how living things are classified |
genus | a classification grouping that contains similar closely related organisms |
species | a group of similar organisms that can reproduce with one another |
evolution | the process that species change over long periods of time |
binomial nomenclature | the naming system in which each organism is given a unique two-part name (created by Linnaeus) |
prokaryote | organisms whose cells lack a nucleus |
nucleus | a dense area in the cell that contains nucleic acids (controls the cell) |
eukayote | organisms with cells that contain nuclei |