剪取一段带叶枝条下端插在滴有红墨水的水中．等看到叶脉微红后把茎横切切面如图1所示问a在茎的横切面上显示为红色．这一现象 Sketch Coloring Page

剪取一段带叶枝条下端插在滴有红墨水的水中．等看到叶脉微红后把茎横切切面如图1所示问a在茎的横切面上显示为红色．这一现象 Template

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tomski剪取一段带叶枝条下端插在滴有红墨水的水中．等看到叶脉微红后把茎横切切面如图1所示问a在茎的横切面上显示为红色．这一现象 coloring

见下图剪取一段带叶的木本植物枝条把下端插入稀释了的红墨水中过一段时间当看到叶脉微红以后把这个枝条纵切和横切用放大镜观察哪一部分被 sketch template

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剪取一段带叶枝条下端插在滴有红墨水的水中．等看到叶脉微红后把茎横切切面如图1所示问a在茎的横切面上 显示为红色．这一现象 sketch template

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学校生物兴趣小组的同学将一株在�暗中放置了两天的绿色开花植物剪取一段枝条插入盛有已稀释的红墨水的广口瓶中将它放在阳光下对其代谢进行研究 sketch template

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为探究植物体内水分的运输速率与叶面积大小的关系某同学设计了如下实验�取两组�龄相同生长状况相似的同种植物枝条分别留下6片和3片叶．�把 sketch template

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取一段带叶的植物枝条将下端插入滴有红墨水的水中过一段时间后枝条的一部分变红了变红的部位是 A．�皮B．形成层C．筛管D．导管题目和 sketch template

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实验题取一段带叶的茎把它放在水里剪断．然后将靠顶端的那一段迅速放进滴有几滴红墨水的水里并在阳光下照射3 4小时．你会�现叶脉红了整个 sketch template

在观察“叶的蒸腾作用实验中选取二枝粗细相�的枝条一枝有叶一枝将叶去掉制成如图所示的AB两个装置将它们放到有阳光的地方．请回答 sketch template

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取同一植株大小相同的两个枝条分别标记为AB．枝条A保留叶片枝条B�除叶片然后将它们分别插入两个相同大小盛有等量清水的量筒中．在量筒中滴 sketch template

如右下图取两段基本相同的同种植物枝条将乙的叶片�剩下一片甲不作处理．两段枝条分别放进装有红色水的甲乙水瓶里．将两个水瓶放在天平两边 sketch template

把一段带叶的茎的下端插入装有稀释红墨水的瓶子里放置在温暖的阳光下过一段时间后当叶脉变得微红时将茎切开会�现茎的横切面也变成了红色．对 sketch template

小李同学做了如下实验在甲乙两个大小相同的烧杯中各加入等量的蓝墨水和红墨水将芹菜的叶柄从基部沿中间切开分别插入两个烧杯中如图所示．一段 sketch template

枝接 360百� sketch template

6．处理插条枝条的形态学上端为平面下端要削成斜面这样在扦插后可增加吸收塔水分的面积促进成活每一枝条留3 4个芽所选枝条的芽数尽量 sketch template

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