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| Biology is the scientific study of life. |
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| DNA is genetic material that organisms inherit from their parents. |
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| A stimulus is a signal to which an organism responds. |
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| Sexual reproduction is a type of reproduction in which cells from two parents unite to form the first cell of a new organism. |
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| Asexual reproduction is the process of reproduction involving a single parent that results in offspring that are genetically identical to the parent. |
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| Homeostasis is the relatively consistent internal physical and chemical conditions that organisms maintain. |
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| Metabolism is the combination of chemical reactions through which an organism builds up or breaks down materials. |
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| The biosphere is the part of Earth in which life exists including land, water, and air or atmosphere. |
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