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Grade 7 Ch 1 Bacteri

From Bacteria to Plants Ch 1 Vocabulary

TermDefinition
organism living thing
cell basic unit of structure and function in an organism
unicellular single-celled organism
multicellular organisms composed of many cells
growth the process of becoming larger
development the process of change that produces a more complex organism
stimulus a change in an organism's surroundings that causes the organism to react
reaction an action or change in behavior
reproduce to produce offspring that are similar to the parents
spontaneous generation the mistaken idea that living things arise form nonliving sources
controlled experiment two test that are identical in every respect except for one factor
variable the one factor that is changed in an experiment
autotrophs organisms that make their own food
heterotrophs organisms that cannot make their own food
homeostasis the maintenance of stable internal conditions despite changes in the surroundings
fossils traces of ancient organisms that have been preserved in rock or other substances
classification the process of grouping things based on their similarities
taxonomy the scientific study of how living things are classified
prokaryotes organisms whose cells lack a nucleus
nucleus a dense area in a cell that contains nucleic acids
eukaryotes organisms with cells that contain nuclei
Created by: Dcoleman
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