See abscisic acid.参阅abscisic acid。...[继续阅读]

    The development of livingfrom nonliving matter,as in the origin oflife. The term is sometimes used for thenow discredited doctrine of spontaneousgeneration.指生命起源时由无生命物质到有生命物质的发展过程。有时指现已被摒弃的自然发生学说。...[继续阅读]

    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...[继续阅读]

    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...[继续阅读]

    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...[继续阅读]

    An antibody that has enzyme activity.具有酶活性的一种抗体。...[继续阅读]

    See photosynthetic pig-ments.参阅photosynthetic pigments。...[继续阅读]

    Denoting a chromosome or frag-ment of a chromosome that lacks a centro-mere.指缺乏着丝粒的染色体或染色体片段。...[继续阅读]

    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.醇与醛加成生成的一种有机化合物。一个...[继续阅读]

    See ethanal.参阅ethanal。...[继续阅读]