試題詳解

47. The driving force that pushes the root tip through the soil is primarily ______.
(A) the elongation of root hairs
(B) continuous cell division of root cap cells
(C) elongation of cells behind the root apical meristem
(D) continuous cell division in the root cap at the tip of the root
(E) continuous cell division just behind the root cap in the center of the apical meristem