题目 【单选题】Organic chemistry is the study of the compounds that make up living organisms. All organic molecules contain: A. Carbon only B. Carbon and Nitrogen C. Carbon and Hydrogen D. Carbon, Hydrogen and Oxygen 相关知识点: 试题来源: 解析 Carbon and Hydrogen 反馈 收藏 ...
In1824,however,theGermanchemistWÖhlersynthesizedurea,andtheoriginalmeaningoftheterm“organic”nolongerapplied.Organiccompounds,inthemodernsense,arethecompoundsofcarbon.Manythousandsofcarboncompoundswhicharenotfoundinorderivedfromlivingorganismshavebeenproducedbychemists,andwelloveramillionorganiccompoundsarealreadyknown...
Life-related organics have measurable effects (biosignatures) when found in association with minerals, but when living cells are not directly responsible, existing terminology can be misleading. Biomineralization is a useful descriptive term. However, the indirect formation of minerals by organisms, such...
A Review of Macromolecular Organic Compounds That Comprise Living Organisms and Their Role in Kerogen, Coal, and Petroleum Formation 来自 Semantic Scholar 喜欢 0 阅读量: 144 作者:JWD Leeuw,C Largeau 摘要: It is generally accepted that the formation of kerogens is the result of the so-called ...
rocks, sediments, or waters of the Earth, whereas organic substances were found only in the tissues or remains of living organisms. It was therefore suspected that organic compounds could be produced only by organisms under the guidance of a power present exclusively in living things. This power...
Organic chemistry is the study of the compounds that make up living organisms. All organic molecules contain:A.Carbon onlyB.Carbon and NitrogenC.Carbon and HydrogenD.Carbon, Hydrogen and Oxygen的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)
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1.noting or pertaining to a class of chemical compounds that formerly comprised only those existing in or derived from plants or animals, but that now includes all other compounds of carbon. Compareinorganic (def. 3). 2.pertaining to, characteristic of, or derived from living organisms. ...
In1824,however,theGermanchemistWÖhlersynthesizedurea,andtheoriginalmeaningoftheterm“organic”nolongerapplied.Organiccompounds,inthemodernsense,arethecompoundsofcarbon.Manythousandsofcarboncompoundswhicharenotfoundinorderivedfromlivingorganismshavebeenproducedbychemists,andwelloveramillionorganiccompoundsarealreadyknown...
yields of organic crops have been found to be about 25 percent lower overall than conventionally grown crops, although this can vary considerably depending upon the type of crop. The challenge for future organic agriculture will be to maintain its environmental benefits, increase yields, and reduce...