“生物钟’是当代生物学中最诱人的课题之一。世界上许多科学家正在全力以赴地进行研究。可是,到目前为止,还没有取得大的进展。概括地讲,”生物钟“是生物体内控制”生理节律“的一种复杂的,由化学、物理变化组成的生理过程。 ”生理节律“是指生命物质周期性变化的现象。比如人的血液成分和体温以一天为周期变化,睡眠和饥饿也是一天为周期。而许多动植物却以年为周期。每年春天,草木萌发,冬眠动物醒来。每年夏天,草木 ”The biological clock is one of the most attractive topics in contemporary biology, and many scientists in the world are doing their utmost to study it, but so far no major advances have been made.“ In summary, ”Is a complex physiological process consisting of chemical and physical changes in the biological control and“ circadian rhythm. ”“ Physiological rhythm ”refers to the phenomenon of periodic changes of living matter, such as the blood components of human and body temperature Changes in the day cycle, sleep and hunger is also a day cycle, while many plants and animals in the annual cycle every spring, vegetation germination, hibernation animals wake up every summer, vegetation