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为什么牵niuhua在早晨开放?

本站新(短)域名:xiguashuwu.com

为什么牵niuhua在早晨开放?

清晨的hua园,牵niuhua张开紫se、白se、红se的小喇叭迎着太yang,到中午时,它已经萎谢了。第二天,又一批hua朵开了。牵niuhua为什么早晨开hua,中午就萎谢了呢?生wu的生活习xing总是经过长时期的自然进化而形成的,但也受周围环境比如yang光、温度、shi度的影响。早晨的空气shirun,yang光柔和,对牵niuhua最为适宜,这时牵niuhuahuaban的上表pi细胞比下表pi细胞生长得快,于是huaban向外弯曲。这样,hua就开了,其他的hua开也是这个dao理。到了中午,yang光qiang烈、空气干燥,jiaonen的牵niuhuahua朵因缺少水分而只好萎谢了。

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