知識貝殼
知識貝殼
The shedding of part of a plant,usually a leaf,fruit,or unfertilized flower,aspart of the plants usual life cycle. As the leafor other organ ages,a distinct abscission zonedevelops at the base of the organ. This zoneconsists of relatively smaller cells,wh ......（本文共 673 字 ） [閱讀本文] >>