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| Biology is the study of life |
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| All organisms store complex information they need to live, grow, and reproduce in a genetic code written in a molecule called DNA |
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| A stimulus is a signal to which an organism responds |
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| In sexual reproduction, cells from two parents unite to form the first cell of a new organism |
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| Asexual reproduction is when a single organism produces offspring identical to itself |
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| All organisms need to keep their internal environment relatively stable, even when external conditions change dramatically. This condition is called homeostasis |
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| All organisms must take in materials and energy to grow, develop, and reproduce. The combination of chemical reactions through which an organism builds up or breaks down is called Metabolism |
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| All forms of life on Earth are connected into a biosphere. |
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