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把握“生物钟”节律搞好年级工作科学地控制生物机体内生理活动作有规律的周期性变化的机制或结构叫做“生物钟”。生物钟节律是一种普遍现象，即不论是低级还是高级、简单还是复杂的生物都存在着周期性节律。如植物的定时开花、应时变色；动物的发情交配、觅食、睡眠和啼...
Grasping the rhythm of the “biological clock” to do a good job in grades The mechanism or structure for scientifically controlling physiological activities in living organisms to make regular periodic changes is called “biological clock.” The circadian rhythm is a universal phenomenon, that is, whether there is a periodic rhythm in low or high, simple or complex organisms. Such as the timing of plant flowering, color change; animal estrus mating, foraging, sleep and sleep ...