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Chap. 1 Lesson 1
What is life?
| Term | Definition |
|---|---|
| Cell | The basic unit of structure and function in living things |
| Organsim | A living thing |
| Unicellular | Made of a single cell |
| Multicellular | Consisting of 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 in someway |
| Response | In the behavior in action or change in behavior that occurs as a result of a stimulus |
| Development | The process of change that occurs during an organism’s life to produce a more complex organism |
| Asexual reproduction | 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 nonliving sources |
| Controlled expirement | An experiment in which only one variable is manipulated at a time |
| Autotroph | an organism that is able to capture energy from sunlight or chemicals and use it to produce its own food |
| heterotroph | An organism that cannot make its own food and gets food by consuming other living things |
| homeostasis | The condition in which an organism's internal environment is kept stable in spite of changes in the external environment |