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一、激素地球上生物繁荣,大自然生气蓬勃。这究竟是一种什么物质和力量来控制着生物的生长发育和繁殖等生命活动呢?主要是生物本身的遗传特性,此外还有生产于生物有机体内的一种化学物质,20世纪初,人们把这种特殊物质叫做“激素”(Hormone),它在生物的整个生长过程中具有特殊的效应。根根激素的发展状况,一般分动物、昆虫和植物三大类。现知动物激素有类固醇、蛋白质及前列腺三类,昆虫激素有保幼、蜕皮、滞育及脑激素四类,植物激素有生长素、赤霉素、细胞分裂素(又称激动素》、脱落酸及乙烯五类。 (一) 类固醇激素:包括性激素、孕激
First, hormones Biological prosperity on earth, nature is animated. This is what kind of material and power to control the biological growth and reproduction and other life activities? Mainly the genetic characteristics of the biological itself, in addition to the production of a chemical in biological organisms, the early 20th century, people This particular substance is called “hormone,” which has a special effect throughout the growth of the organism. The development of root hormone, the general sub-animal, insect and plant three categories. Now known animal hormones steroids, proteins and prostatic three kinds of insect hormones have nursery, molting, diapause and brain hormones four kinds of plant hormones auxin, gibberellin, cytokinin (also known as kinetin, shedding Acids and ethylene five. (A) steroid hormones: including sex hormones, pregnancy stimulation