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Chapter 1 lesson 1
What is life
Term | Definition |
---|---|
organism | a living thing |
cell | the basic unit of structure and function in an organism |
unicellular | a single celled organism |
multicellular | an organism composed of many cells |
metabolism | the combination of chemical reactions that an organism uses to break down materials |
stimulus | a change that causes an organism to react |
response | an organism's change in behavior do to a stimulus |
development | the change that happens over a lifetime, producing a more complex organism |
asexual reproduction | involves only one parent that produces offspring identical to the parent |
sexual reproduction | involves two parents and produces offspring that differs from both |
spontaneous generation | the mistaken idea that living things can arise from non-living sources |
controlled experiment | a series of tests where only one variable is changed |
autotroph | organisms that make their own food |
hetertroph | organisms that cannot make their own food |
homeostasis | the maintenance of stable internal conditions |