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Chap 1 Lesson 1
What is life
Term | Definition |
---|---|
Cell | The basic unit of a structure in a 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 |
stimulus | Any change or signal in the environment that can make an organism react in anyway |
response | An action or change in behavior that occurs as a result of stimulus |
development | The process of change that occurs during an organism life to produce a more complex organism |
asexual reproduction | A reproduction process that involves only one parent and produces offspring that are genetically identical to the parent |
sexual reproduction | A reproduction that involves two parents that combine their genetic material to produce a new organism which differs from bother parents |
spontaneous generation | The mistaken idea that living things arise from nonliving sources |
controlled experiment | 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 produces 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 |