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| Scientific study of life. |
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| Deoxyribonucleic acid, a self-replicating material present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information. |
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Definition
| Signal to which an organism responds. |
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Definition
| Type of reproduction in which cells from two parents unite to from the first cell of a new organism. |
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Definition
| Process of reproduction involving a single parent that results in offspring that are genetically identical to the parent. |
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| Relatively constant internal physical and chemical conditions that organisms maintain. |
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| The combination of chemical reactions through which an organism builds up or break down materials. |
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| Part of the Earth in which life including land, water, and air or atmosphere. |
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