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| every substance and energy in the universe except what humans have manufactured |
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| basic building blocks of matter |
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| smallest unit of life that can reproduce and survive on its own |
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| individual that consists of one or more cells |
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| group of individuals of the same type or species living in a given area |
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| all populations of all species in a given area |
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| a community interacting with its environment |
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| all regions of earth's crust, waters, and atmosphere in which organism lives |
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| a characteristic of a system that does not appear in any of a system's component parts |
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| a substance that an organism needs for growth and survival |
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| make their own food using energy and materials from environment |
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| cannot make their own foods. They get energy by feeding on other organisms |
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| feed on wastes or remains of other organisms |
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| Why is energy not cycled? |
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Definition
| because with each transfer,some energy escapes as heat, and cells do not use heat to work |
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| a molecule that responds to a specific form of stimulation |
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| set of processes by which organism keeps internal conditions in a normal range |
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| deoxyribonucleic acid; molecule that carries hereditary information about traits |
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| group of species that share a unique set of features |
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| their DNA is not contained within a nucleus |
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| multicelled species that live on land or in freshwater environments |
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| multicelled consumers that ingest tissues or juices of other organisms |
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| Judging information before accepting it |
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