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Chapter 1 Lesson 1
what is life
| Term | Definition |
|---|---|
| Organism | living thing |
| Cell | Basic unit of structure and function in an organism |
| Unicellular | a single-celled organism |
| Multicellular | an organism with many cells |
| Metabolism | The combination of chemical reactions through which an organism builds up or breaks down materials |
| Stimulus | any change or signal in the environment that can make an organism react |
| Response | an action or change in behavior that occurs as a result of a stimulus |
| Development | the process of change that occurs during an organisms life to produce a more complex organism |
| Asexual Reproduction | a reproductive process that involves only one parent and produces offspring that are genetically identical to the parent |
| Sexual Reproduction | a reproductive process that involves two parents that combine their genetic material to produce a new organism which differs from both parents |
| Spontaneous Generation | the mistaken idea that living things arise from non-living sources |
| Controlled Experiment | An experiment in which only one variable is manipulated at a time |
| Homeostasis | the condition in which an organism's eternal environment is kept stable in spite of changes in external environment |
| Heterotroph | An organism that cannot make its own food and gets food by consuming other living things |
| Autotroph | An organism that is able to capture energy from sunlight or chemicals and can use it to produce its own food |
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