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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 |