See abscisic acid.參閱abscisic acid。...[繼續(xù)閱讀]

    The development of livingfrom nonliving matter,as in the origin oflife. The term is sometimes used for thenow discredited doctrine of spontaneousgeneration.指生命起源時由無生命物質(zhì)到有生命物質(zhì)的發(fā)展過程。有時指現(xiàn)已被摒棄的自然發(fā)生學(xué)說。...[繼續(xù)閱讀]

    A PLANT HOR-MONE once thought to be responsible forthe shedding (abscission) of flowers andfruit and for the onset of dormancy in buds(hence its early name,dormin). The com-pound is associated with the closing ofpores (stoma) in the leaves of plants de-pr...[繼續(xù)閱讀]

    1. The uptake of liquid bycells. Most digested food is absorbed in thesmall intestine; the liquid products of di-gestion are absorbed into the blood and lymphatic systems. In plants,water andmineral salts are absorbed mainly by theroot hairs,just behind t...[繼續(xù)閱讀]

    A plot of the amountof absorption by a substance of radiation atdifferent wavelengths,usually of ultravio-let,visible,or infrared radiation. An ab-sorption spectrum can give information a-bout the identity or quantity of a sub-stance. It can also give inf...[繼續(xù)閱讀]

    An antibody that has enzyme activity.具有酶活性的一種抗體。...[繼續(xù)閱讀]

    See photosynthetic pig-ments.參閱photosynthetic pigments。...[繼續(xù)閱讀]

    Denoting a chromosome or frag-ment of a chromosome that lacks a centro-mere.指缺乏著絲粒的染色體或染色體片段。...[繼續(xù)閱讀]

    A type of organic compoundformed by addition of an alcohol to an alde-hyde. Addition of one alcohol moleculegives a hemiacetal. Further addition yieldsthe full acetal. Similar reactions occur withketones to produce hemiketals and ketals.醇與醛加成生成的一種有機化合物。一個...[繼續(xù)閱讀]

    See ethanal.參閱ethanal。...[繼續(xù)閱讀]