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取一段带叶的枝条插在盛有稀释红墨水的瓶中放在阳光下过一段时间用刀片把枝条纵切开用放大镜观察被染成红色的是 A．导管b．筛管c Template






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sketch 5278 Cosmos by Jenna Khoùlix
sketch 3818 เดียวจะวาดใหม่ยังไม่เสร็จๆ
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sketch 2608 Beauty and the Beast by sketchmaster
sketch 3365 Igor by Johan Kennet Espinoza Moreno
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sketch 3508 Medusa by Nelly Panambo
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sketch 3447 Hidan (Akatsuki) by ßeyza Karaca
sketch 3127 Hulk George Lucaz
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tomski取一段带叶的枝条插在盛有稀释红墨水的瓶中放在阳光下过一段时间用刀片把枝条纵切开用放大镜观察被染成红色的是 a．导管b．筛管c coloring
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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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选取粗细所带叶片大致相的生活动旺盛的同种植物新鲜的三段枝条把其中一枝的叶片去掉插入相同盛稀释红墨水的瓶子里然后将AC放到阳光下 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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取同一植株大小相同的两个枝条分别标记为AB．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
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生物小组的同学将一株绿色开花植物置于暗环境中一天后剪取一段枝条插入右图广口瓶中对其生理活动进行探究．1清晨把该枝条从暗中取出后 sketch template
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某同学在做探究茎对水分和无机盐的运输的实验时进行了如下操作取一新鲜带叶的丁香枝条将其下端插入装有红色溶液的锥形瓶中然后放在温暖阳的 sketch template
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取一段木本植物的茎将其下端插入滴有红墨水的水中经过一段时间后枝条的一部分会变红变红的部位是A 皮 B 所以浸入水中茎的部分C sketch template
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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
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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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给你两个如图所示的装置锥形瓶里面插相同植物的枝条一枝有叶一枝无叶两瓶内水面高度相同请设计一个实验探究植物的叶是否是蒸腾作用的器官 sketch template
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探究叶是植物进行蒸腾作用的主要器官．1提出的问题是 ．2作出假设 ．3实验器材带叶的枝条透明料袋试管剪刀清水等 sketch template
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小慧在水中切取同一植物且粗细相同的两枝条使其长度相等并将其中一枝条的叶片全部除再分别插入装有等体积红色溶液的两烧杯中标示为甲乙两组 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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图为枝芽与一段枝条的结构图据图同答1．观察图1完成各部分名称a生长点生长点b叶原基叶原基c幼叶幼叶d芽轴芽轴e芽原基芽原基2 sketch template
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将带叶子的枝条放入盛有稀释红墨水的瓶中置于温暖有阳光的地方当叶脉变得微红时取出枝条用清水洗去枝条表面的红墨水用刀片横切茎并用放大镜 sketch template
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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
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为了探究“植物完成蒸腾作用的主要器官 某研究小组的同学设计了如下实验方案 首先从一株阔叶植物上剪下大体相同的两个枝条将一个枝条插入A sketch template
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如图中甲乙丙3支试管里有等量的清水插有形态重量相同的植物枝条均在水面上滴加一层植物油乙试管口上方的枝条用无色透明的干料袋包严．先将3 sketch template
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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AB两个装置将它们放到有阳光的地方．请回答 sketch template
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植物学绘画之叶的学绘画方法 知乎 sketch template
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某同学设计了下图所示的实验装置来验证叶的蒸腾作用．取三支试管各注入相同体积的清水分别插入一颗大小相似的枝条甲乙装置枝条保留全部叶丙 sketch template
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取一段带叶的枝条插在盛有稀释红墨水的瓶中放在阳光下过一段时间用刀片把枝条纵切开用放大镜观察被染成红色的是 A．导管B．筛管C sketch template
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七年级生物上册354植物茎的输导功能同步课时达标练习苏教版教案 Word文档在线阅读与下载 免费文档 sketch template
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把一段带叶的茎下端插入装有稀释红墨水的瓶子里放置在温暖的阳光下待到叶脉微红时用肉眼观察茎的横切面染红的结构是 A．韧皮部 B sketch template
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下图是一段枝条上面长有两个大小相同的果实如果将两个果实之间的皮进行环剥请问 1将来不能长大的果实是 原因是 2环割后的 sketch template
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取一段带叶的枝条插入盛有红色染液的瓶里过一段时间把茎切开观察被染色成红色的部分是 A皮 B形成层 C木质部 D韧皮部——青夏 sketch template
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进行压条时要预先把枝条埋进土里的部分划破皮这样有利 从而促进生根 A．吸收水分 B．吸收无机盐 C．吸收营养 D．积蓄有机养料 sketch template
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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
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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
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学习了各类生物的生殖后你认为下列说法不正确的是 A．植物的组织培养属于无性生殖B．昆虫鸟的生殖属于有性生殖C．无性生殖和有性生殖都能 sketch template
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小强同学为了证明植物的茎有输导功能设计了如下两个实验实验一将一根带叶的杨枝条的下端插入装有红墨水的瓶中放在温暖的阳光下．当叶脉有点 sketch template
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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
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下列中哪一项不属于生物多样性的范畴 A生物种类B基因种类C生态系统种类D形态种类 题目和参考答案——青夏教育精英家教—— 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