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Chapter 1 lesson 1
What is life?
Term | Definition |
---|---|
Cell | The basic unit of structure and function in living things |
Organism | 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 |
Stimulas | Any change or signal in the environment that can make a organism react in some way |
Response | an action or change of behavior that occurs as a result of a stimulas |
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 nonliving sources |
Controlled experiment | an experiment where one variable is manipulated at a time |
autotroph | An organism that is able to capture energy from sunlight 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 organisms internal environment is kept stable in spite of changes in the external environment |