2020-2021学年七年级生物上册人教版同步课时作业3.2.2植株的生长
※题型：单选题※知识点：单选题※试题难度：中等<br>如图所示为根尖的结构模式图,图中具有分裂增生能力的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2019/1/23/3D2DFDB1867FF4F1BF2254A37B82FCAD.png"><br>A.①区 B.②区 C.③区 D.④区<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/99a068f29b134850a9985d209dd58c50/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/fd9cb04f94234493bcc706f4500651f2/40253A7A3BF6DA6792B91BD04EACF885.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列对“根尖的结构”的相关知识的叙述,正确的是( )<br>A.根尖成熟区细胞有叶绿体<br>B.根尖的细胞分裂时,核内的遗传物质先进行复制<br>C.根尖伸长区有大量根毛,利于吸收水和无机盐<br>D.幼根的生长靠分生区细胞的伸长和伸长区细胞的分裂<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/f4f7c512a4bf4581956c91da0a6096d2/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/f1b7512150d246a792241fa63a4ca10d/129BD1D64DD0DCE901C0E54AF8B881D0.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>植物体的枝条是由芽发育来的。如图是芽的纵切面结构示意图,图中发育成枝条上侧芽的结构是( )<img src="https://picture2.zhihuicn.com/testImage/2/2019/9/9/8992816E318E74CD85F3229C4214B9E7.png"><br>A.1 B.2 C.3 D.4<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/c1d9c8e16dc94126b8e107f95ad8583f/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/92f07c89a81c47f4b36491f95476b2e7/B7F0DD7CB70945230B9A38434A849980.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>小明家院子里一棵未经修剪的果树,有侧枝5条,那它具有几个顶芽( )<br>A.1个 B.4个 C.5个 D.6个<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/ae50ebac6dcc489eae53da5dbc16f435/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/229b9a275b4a42438a509760ba28f1f0/4534A9B69684779FC15B7D7F2F9D3130.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>芽能够发育成含有叶、茎和芽的枝条,主要原因是( )<br>A.芽中有幼叶、垄等器官<br>B.芽中细胞的体积变大<br>C.芽原基可发育成茎<br>D.芽中分生组织的细胞分裂、分化<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/d1ac6599db5144718be42d8ff7efc15d/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/afee461e026645a284b2dc44d8643b10/CD1EFB14A0114C2F9A4E520F22FDFF81.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>如图为叶芽发育成枝条的示意图,下列相关叙述正确的是( ) <img src="https://picture2.zhihuicn.com/testImage/2/2019/4/15/B24F726406F970E8102BF9EFFFF03CB8.png"><br>A.植物的叶是由①叶原基发育而来的<br>B.植物的侧芽是由③生长点发育而来的<br>C.植物的茎是由②芽轴发育而来的<br>D.侧芽和顶芽的结构不同<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/707ac7a66ee749f89aec269d2f0dc8d6/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/a048667fb1e54618850de67a681ca916/AC54D2524D5F6998BE242EFF5FDE48BF.png"><br><br>
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