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①牵牛花、金银花等攀缘植物有一套非凡()的本领,这就是能够依附支架,利用茎尖的“运动”不断向上爬攀。就拿牵牛花来说,它茎的顶端10~15厘米一段,由于各个方向的表面生长速度不一致,能在空间不断改变自己的位置,而且始终以一定的方向旋转着,并以此为半径,在一圆周内遇到依附物后,就会把依附物缠绕起来,攀向高处去争取()阳光和雨露。②有趣的是,大多数植物的“转头运动”是有一定方向的。如金银花、菟(tu)丝花、鸡血藤等始终向右旋转,牵牛、扁豆、马兜铃、山
① Morning glory, honeysuckle and other climbing plants have an extraordinary () ability, which is able to rely on the stent, the use of the tip of the “movement ” climb up climb. Take the morning glory, the top of its stem 10 to 15 cm section, due to the uneven growth rate of the surface in all directions, can constantly change their position in space, and always in a certain direction of rotation, and as a radius , Encounter attached objects in a circle, it will winding up the attachments, climb to a height to fight () sun and rain. Interestingly, most plants have a certain direction of rotation. Such as honeysuckle, 菟 (tu) silk flowers, Millettia, etc. always rotate to the right, morning glory, lentils, aristolochia, mountains