2021-2022学年生物人教版七年级上学期预习练：2.1.2植物细胞
※题型：单选题※知识点：单选题※试题难度：中等<br>制作洋葱鳞片叶表皮细胞临时装片时,不需要用到的材料用具是( )<br>A.盖玻片 B.载玻片 C.清水 D.生理盐水<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/ccbc7fbbae94448ab1025d623febd531/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/5810afaf5ece47d78e9e722791108ade/676DA965E8F2DDB7718FD8079C377B1C.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>制作临时装片时,必须让盖玻片的一边先接触水滴,然后再缓缓地盖上,其目的是( )<br>A.防止水溢出来污染装片 B.避免实验材料移动<br>C.避免盖玻片下面出现气泡 D.增强透明度<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2016/28f9b5ffd57e42728bb03a3458a50d3e/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2016/aa4edfff6510483a8d457b2b12e65e31/82E033EFE031C7B4F1FAFE68B1DFA2C3.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>制作洋葱鳞片叶表皮细胞的临时装片时,染色的正确方法是( )<br>A.先将碘液滴在载玻片中央,再将洋葱表皮放入并展平<br>B.先盖盖玻片,再将碘液滴在盖玻片一侧,另一侧用吸水纸吸<br>C.将洋葱表皮放在载玻片的水滴中并展平,再加一滴碘液,然后盖上盖玻片<br>D.直接将碘液滴在盖玻片上,再用吸水纸吸去<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2013/3c1183ecbca84cd48231bff7a659274a/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2013/801d8b4e7b994210875d14d6bb0494b2/0275231DA81DD38EDA573924382D5605.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>用显微镜观察植物细胞,一般要先制作装片或切片。下列制作临时装片的几个步骤中,它们的先后顺序应是( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/10/30/505566E269AB7F82BBC173417ED44BA9.jpeg"><br>A.①②③④ B.②③④① C.④②①③ D.③④②①<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/9f817950cc83439282835f0765736c7f/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/0ed2ad61cb8f4453846fc2186d9079f4/F0B3D75FEE536C00EFBB35988CB5AD19.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>对细胞起保护作用的结构是( )<br>A.细胞壁 B.细胞壁和细胞膜<br>C.细胞质 D.细胞核<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/fa8a875a2c0d466d92859b4a2632402c/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/3e9657f900b54d3197972f3d6364cbd6/F898C49F61C57116F6981DB79F3E2F4D.png"><br><br>※题型：实验题※知识点：实验题※试题难度：中等<br>小科在观察洋葱表皮细胞实验的过程中,观察到下列物像(如图):<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/11/12/EB18B205F5F61FCAE99311EC49F05A5F.png"><br>1.制作装片时,先要在洁净的载玻片中央滴一滴;<br>2.观察时,看到了物像D,在此之前看到的物像依次是。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/816af163051c437495495487febeb77f/05F482CC5CBB1075778E11C5753E7BCD.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/5ecee32465b14fdc88595c14d951c87d/1A4E7B63AF5A74EF62744BD9F9550260.png"><br><br>
页:
[1]