58. A difference between a stem and a root in secondary growth is that the root often lacks ______.
(A) xylem
(B) vascular cambium
(C) pith
(D) parenchyma rays
(E) cork
詳解 (共 3 筆)
未解鎖
髓為莖的維管組織以內的基本組織，而在單子...
未解鎖
莖和根在次生生長（secondary ...
私人筆記 (共 1 筆)
未解鎖
(E) 木栓 (Cork)：根主要通過其...
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