作者ISME0907 (ISME)
看板post-b.test
标题[问题] 问一题植物学~
时间Sun Apr 17 01:06:47 2011
Which of the following statements regarding fern is ture?
A) Ferns do not have lignfied cell wall
B) Ferns have well developed vascular tissue, roots, and stems
C) Ferns produce seeds
D) Ferns produce pollen
这题答案为B
我想问一下A选项,在演化的过程中,哪各阶段才出现lignfied cell wall?
次级细胞壁才算lignfied cell wall,那bryophyte有次级细胞壁吗?
谢谢大家罗~
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1F：推 undeadfish:bryophyte没有 fern有 04/17 01:11
2F：→ ISME0907:请问为什麽呢?谢谢^^ 04/17 17:33
3F：推 skypons:因为无种子维管束植物是从蕨类开始的 04/17 17:40
4F：→ Kusari:演化的过程中,到了出现木本植物的时候就需要木质化细胞壁了 04/17 18:56
5F：→ Kusari:ex.树蕨 04/17 18:56
6F：→ Kusari:说木本植物其实有点语病...大概超过1m就需要靠lignin来撑 04/17 18:57