题目内容

侧根为定根，起源于根毛区内中柱鞘的一定部位，即总是发生于原生木质部与原生韧皮部之间的地方。

A. 对
B. 错

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侧根的发生与根的顶端分生组织无关。

A. 对
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由于侧根起源于内皮层，所以称为内起源。

A. 对
B. 错

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