5.1.3软体动物和节肢动物—2021-2022学年生物人教版八年级上册同步课时作业
※题型：单选题※知识点：单选题※试题难度：中等<br>河蚌体表的贝壳是( )<br>A.由珍珠层不断增厚形成的<br>B.由外套膜的分泌物形成的<br>C.由水中某些物质在体表沉积形成的<br>D.斧足不断运动的结果<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/cfa71155f5e7436e8d30da75f80701eb/CFD11B39D2C70E3BAFF53A76B86BA12A.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/a729f64730c84f398f02786271de45f5/15FDB6504155E1D9B808DFF7FE30A45D.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>河蚌的呼吸器官是( )<br>A.鳃 B.贝壳 C.外套膜 D.肺<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/8bd9d470711e40c89f06155f4ad2745b/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/cae77d8627cd43439340ce9d44e5faad/EA301DDBF25C97537DCA20E027F4659E.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下面生物特征中,不属于软体动物主要特征的是( )<br>A.身体柔软 B.大多具有贝壳<br>C.身体表面有外骨骼 D.运动器官是足<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/5986e3338a4e4c199c3b9aab80fb4a68/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/9095470d3f9b494ebdd5725cb9531e5b/9957D9858440F74359CEADD83BAB346E.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列关于软体动物说法错误的是( )<br>A.贝壳是由外套膜分泌的物质形成的<br>B.软体动物的运动器官是足<br>C.软体动物可以食用,对人类没有危害<br>D.乌贼的身体内有退化的贝壳<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/697ad0c74f3f421780a06ef000e43e97/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/011a98d5590f49b7a5478ff18023b360/57006C91CFDF52F3959C5D059533A5EF.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>动物界中种类最多、数量最大、分布最广的一个类群是( )<br>A.软体动物 B.节肢动物 C.线虫动物 D.环节动物<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2021/497e37f8a39b454ebcf2e4ae5171c977/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2021/df4a2242ab824580be2a74e321615dfa/9B2E75E4BD3B9E79C66EE63165B8E8C2.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>如图所示,金蝉正在脱“壳”,这层“壳”实际上是蝉的哪一结构( )<img src="https://picture2.zhihuicn.com/testImage/2/2018/2/27/458DDB313A99168373F7851F3FB3C32F.png"><br>A.外骨骼 B.角质层 C.贝壳 D.外套膜<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2018/40e18dedd19640c1b2b9111b13adbaaf/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2018/cd22b2c719404eb8bdb37c3725803302/C6EAB94F49D4A0CDDF257B98E669BDD2.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列四种动物特征的描述正确的是( )<br>A.涡虫——背腹扁平,体表有角质层,有口无肛门<br>B.蛔虫——身体由相似的体节组成,有口有肛门<br>C.河蚌——身体表面有外套膜,用气管呼吸<br>D.蚯蚓——身体呈圆筒形,体壁湿润能进行气体交换<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2021/5d063d411d0e43f48b68a00d2edde0f8/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2021/de82ad756cc345479762b0c6439a949f/BDE12EE206DD1F4DABFB4E6453552D37.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>落在叶片上的蜻蜓,我们能清楚地看到它的腹部不停胀缩,这是在( )<br>A.休息 B.消化 C.呼吸 D.闻气味<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/0277165040e14e199d0d8e7ce7afbe9d/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/5ab65c78b4b24c95becbc15bb870e929/BE20CC19A7766FCA8FBFB0CDCA59BF33.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>节肢动物具有的特点是( )<br>A.身体被毛,用肺呼吸 B.身体分节,足和触角分节<br>C.体表具鳞片,用肺呼吸 D.体表光滑,用皮肤呼吸<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2021/611e8440b413419c8d2d9a1089e33214/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2021/619e946a42044f779c459327ace147db/EDF88346B9457F11017E1677976CD453.png"><br><br>
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