2020-2021学年生物北师大版七年级上册同步实验室（三十一）观察根尖的结构
※题型：单选题※知识点：单选题※试题难度：中等<br>种子萌发长成的幼苗发育时,根的___生长最快( )<br>A.根冠 B.成熟区 C.伸长区 D.分生区<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/e410af3153bd4c6da6cdb57a9ed498e2/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：中等<br>在探究“根的什么部位生长最快”的实验中,几位同学在测量幼根的生长速度时所获得的数据不同,应选取( )<br>A.平均值 B.最大值<br>C.最小值 D.全部重做一次<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2015/963a6f52ba134ff58b5983b56ac9e313/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2015/952bbfbea61a4376971879e0e19c6e66/8E1FE62BFA463D122DE2D2F124EA9DAE.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>某学生探究根的哪一部位生长最快,在实验绘制了根尖各段长度图,请你预测生长最快的一段是( )<img src="https://picture2.zhihuicn.com/testImage/2/2019/9/21/797AFB93499B07FB8FAFC69068C62E51.png"><br>A.① B.② C.③ D.④<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/31481a36453d408d8baa11d8d764d44f/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：较易<br>在显微镜下观察根尖的结构,由顶端依次(由下向上)是( )<imgA.①②③④ B.④③②① C.①②④③ D.④①②③<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/d015af9dbd7543b380489af4a4384a51/4EF59C4461E28F3B3B09551EB8B9AC3F.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/866fc8100863490380f61ee8e550d189/FD860C3C32BC442E5F7474A5F5DB80ED.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>用显微镜观察洋葱根尖纵切片,视野如图所示。视野中的区域位于根尖结构的( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/7/17/DB12FF4D7CC65CAAA346C741463334D7.png"><br>A.根冠 B.分生区 C.伸长区 D.根毛区<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/2d60398fbbda414fb44b81e804681f5e/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：中等<br>根之所以能不断地伸长,是由于( )<br>A.伸长区细胞不断伸长和根冠细胞分裂<br>B.分生区细胞不断分裂与伸长区细胞伸长<br>C.根冠细胞分裂与成熟区细胞伸长<br>D.分生区细胞分裂与成熟区细胞分化<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/cdf4aa90ffa447aca7fd5282a2c26b9a/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/4b0096291b7d4b85826f1c41e1e93972/6DE0B49F75D8A011A7BEAFC4118D8117.png"><br><br>※题型：读图填空题※知识点：读图填空题※试题难度：中等<br>下图是根尖的纵切面结构图。根据图填写有关根尖结构和功能的内容。<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/7/16/AD30BB0E218637A9BEB77E5A17E1183B.jpeg"><br>(<br>)<br>图中<br>是<br>_<br>_________________<br>;<br>(<br>)<br>图中<br>是<br>_<br>_________________<br>,细胞具有很强的<br>_<br>_________________<br>能力;<br>(<br>)<br>图中<br>是<br>_<br>_________________<br>,是根生长最<br>_<br>_________________<br>的部位;<br>(<br>)<br>图中<br>是<br>_<br>_________________<br>,是吸收<br>_<br>_________________<br>的最主要部位。<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/3a3512447942498aa3806905a618c39a/11E4041AC02E519F938F64888D67FC5B.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/9063600eed494f4e96d9bda06b2f560d/760223096FC7F04301A2BE7FF312ED67.png"><br><br>※题型：读图填空题※知识点：读图填空题※试题难度：中等<br>如图是根尖结构示意图,据图回<br>冋<br>答问题。<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/8/17/A68FB592E70A6E151D9A3CC8BB626C33.png"><br>1.根吸收水分和无机盐主要由根尖的(填序号)来完成,因为这个区域生有大量的。根吸收的水分和无机盐由输送到茎、叶、花等器官,植物需要量最多的是含的、含的和含的无机盐。<br>2.根的生长主要靠根尖的和两部分区域。(填序号)<br>3.小明要移栽黄瓜幼苗,小红建议要带土移栽,你同意小红的建议吗?。你的理由是:保护幼根和。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/b944bc4a6bdb42d89d60061fcfc86677/C37A168FDBED2E8A1F25ED855B78DA35.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/b5ef15991f844008bbe4669a697814b2/F48C012C3D23F61D7C97DA91C24BA3F3.png"><br><br>
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