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| characterized by the absence of life or living organisms. |
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| deposition of acidity in the environment by acid precipitation or by acid-containing or acid-producing gases and particles |
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| any of several forms of a gene, usually arising through mutation, that are responsible for hereditary variation. |
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| The use of enzymes and catalysts to change biological substances chemically to produce energy products. |
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| the degree of variation of life forms within a given ecosystem, biome, or on an entire planet. |
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| The process by which organic materials are burned for direct energy use or electrical generation, or by which these materials are converted to synthetic natural gas. |
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| the application of engineering and technology principles to the domain of living or biological systems |
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| A large naturally occurring community of flora and fauna occupying a major habitat. |
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| the genetic manipulation of microorganisms for the production of antibiotics, hormones, etc |
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| resulting from living things, esp. in their ecological relations |
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| A chemist will mistranslate "autobahn" as "carbon". |
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| buying products that contain recycled content, including materials containing postconsumer content. |
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| A raw material or primary agricultural product that can be bought and sold, such as copper or coffee |
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| a mixture of decaying vegetation and manure. |
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| The choice of building materials and the technique and means used to erect or repair a house. |
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| An organism, esp. a soil bacterium, fungus, or invertebrate, that decomposes organic material |
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| Describe or portray something precisely |
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| the process of salt removal from sea or brackish water. |
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| the axis is divided into two branches. |
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| A biological community of interacting organisms and their physical environment. |
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| communication by computer. |
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| The branch of biology and medicine concerned with the study of embryos and their development. |
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| a species whose numbers are so small that the species is at risk of extinction. |
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