2020-2021学年八年级生物上册人教版同步课时作业5.1.1腔肠动物和扁形动物
※题型：单选题※知识点：单选题※试题难度：中等<br>海葵是青岛海边常见的腔肠动物。下列关于海葵的叙述,正确的是( )<br>A.身体由外、中、内三个胚层构成<br>B.身体呈圆筒状,两侧对称<br>C.体表有用于攻击和防御的刺细胞<br>D.消化道前端有口,后端有肛门<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/4e0388af670e4e149aeb5025a03d1c65/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/f98e7d713d1b487fb656afd9f63e560c/6E571F38D3F3E60F546A3DF4B005A7E8.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列动物中,身体结构呈辐射对称的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2019/5/8/4A4224B18EFA12491B3161284B8B2ADF.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2019/5/8/9B07F1861351715627C360DB38ADC67F.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2019/5/8/B93EA3899AE6E48266C3B2FEDF92D5CF.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2019/5/8/19C2ECD8AD9A78F7ECC5AD9DF7599D06.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/0bbc4f5080db442aa115820a8e76262d/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/6266bfdc9c3b418683a0f5b0808a190d/B4F37B340CF9B53F3E5E4CE6810E0E86.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>腔肠动物所具有的特殊细胞是( )<br>A.刺细胞 B.腺细胞 C.变形细胞 D.领细胞<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/fd800656e343411c86176ea37fc6a49e/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/d2cecf3d754f4cf099925268d7755455/C754C93EAD32F02D1A5E762C78295945.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列属于腔肠动物主要特征的是( )<br>A.两侧对称 B.背腹扁平<br>C.体表有角质层 D.有口无肛门<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/7345b4e7abd743dbbdf49d02d921b816/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/8bb4e8fae336457781e3df5428bd17ab/FF9C8668A9E3EB9D30B6D8A5EE2DAE67.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>关于如图所示的动物,描述不正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2019/9/9/AC6BBA0D9211DCD4109DD5563B62017A.png"><br>A.有口无肛门 B.身体呈辐射对称<br>C.背腹扁平 D.属于腔肠动物<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/e8109d47d3d74d228957e324f4f93756/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/508ff2c5d5c44bb789aeb4331224ee55/8E625F094CEA52065528D1762DACA9B4.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>图为水螅结构示意图,其中有捕食作用的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2019/9/9/E5558E3E4C205753A5058225A4C6294E.png"><br>A.1 B.2 C.3 D.4<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/0f5ad280d51749c68d06ad4545f5cd3b/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/70427ed727a1498e9f8823f9ffacf2c1/08B093798BDA83BDF05E7C22B8C2A904.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>若在清澈且水草茂盛的溪流中仔细寻找,你可能会发现水螅和涡虫,二者的共同特征是( )<br>A.背腹扁平 B.身体辐射对称<br>C.有口无肛门 D.由内外两层细胞构成<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2016/c1ce50b87b4b4be380ef00466fb59737/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2016/3583274167c84966bfbcbfdb2dad6d72/3995ECF0C1EA0931740C5CA820F16D68.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列有关日本血吸虫病的叙述,错误的是( )<br>A.可与血吸虫病人日常接触<br>B.血吸虫在感染人之前首先在钉螺体内繁殖、发育<br>C.由血吸虫卵孵化的幼虫可以直接感染人<br>D.若进入含有钉螺的水域可能会感染血吸虫病<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/085b0ea923894e699312485353623260/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/e872174d95b04b64bfacfb9fe19894a4/A09FA49FC5F156016109B20DF50571DC.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>如下图,涡虫排出食物残渣的结构是( )<img src="https://picture2.zhihuicn.com/testImage/2/2019/9/9/FB58CEA9F3AF83923A66DA080546F7FC.png"><br>A.① B.② C.③ D.④<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/4caa3d68dca348d3bc37c0dfaf3d913f/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/11531b8e78b9480fa3be9efd851d2ad9/A3DAE537256A62034919BF7E413504B1.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>人体感染猪肉绦虫的最常见、最主要的原因是( )A.活的猪肉绦虫颈部节片随食物进入人体<br>B.活的猪肉绦虫受精卵由不洁蔬菜带入人体<br>C.活的猪肉绦虫妊娠节片随污染的手的触摸进入人体<br>D.活的猪肉绦虫的幼虫由未煮熟的猪肉进入人体<br>答案<br><img src="https://picture1.zhihuicn.com/Answer/2/9/2BB966A0E0D0EF1A330D14E3ADEDA5C5.png"><br>解析<br><img src="https://picture1.zhihuicn.com/Explain/2/9/B66FDA1396A157A079FB37BAB432242B.png"><br><br>
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