知识贝壳
知识贝壳
所属栏目：英汉双解生物学
The organized loss of part of aplant,usually a leaf,fruit,or unfertilizedflower. An abscission zone occurs at the baseof the organ. Here a separation layer (ab-scission layer) is formed by breakdown orseparation of cells and final severance occurswhen the ......（本文共 353 字 ） [阅读本文] >>