There have been many investigations of the effect of different organic compounds on plants in relation to flowering. The primary motive has been to look for compounds that could possess ...
Just like phototropism, gravitropism is also caused by an unequal distribution of auxin. When a stem is placed horizontally, the bottom side contains more auxin and grows more - causing the stem ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果