2020-2021学年八年级下册生物北师大版同步课时作业（7）动物的主要类群
※题型：单选题※知识点：单选题※试题难度：中等<br>小明对7种动物进行了分类,类别1:美人鱼、壁虎、蟾蜍、泥鳅;类别2:蚊子、苍蝇、蝗虫。分类依据是( )<br>A.水生还是陆生 B.有无脊柱<br>C.飞行还是爬行 D.胎生还是卵生<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/84f322767b4f4c1db79816223b6f35b6/76900E09FAB5EBA344B8EA84E844FF07.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>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/2/2020/9/14/4C6A0468C1DC688E846C84F29AE89F33.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2020/9/14/6245D55C0891BBC37103B21075446455.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2020/9/14/91437853824FBF8FD2FCFCAC79BD4879.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2020/9/14/BC4AFD059C53B13793FA11E881BF23FB.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/8f0e0878d50d4b3ca4739735836c7adb/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/9ff1e9b9d05b4a7087b2a4ec06ba97b7/73A6CC83CA951BD15F88ABDFAF55F577.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列不是扁形动物特点的是( )<br>A.背腹扁平 B.两侧对称 C.有刺细胞 D.有空无肛门<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/b18f16a2cf7143d8895fce904b6853ed/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>“五岛一湾”是湛江著名的旅游风景区,其海鲜很有名,下列哪组海鲜属于软体动物( )<br>A.缢蛏、红鱼 B.章鱼、乌贼 C.龙虾、螃蟹 D.鲍鱼、海蜇<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/17e56d853d3b45dbb933cd7ca253220e/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/8f6f64202d444ee29a801214fe9ed333/945E429CDF2386AD37BAB1573910D9D8.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>动物界中包含动物种类最多的类群是( )<br>A.软体动物 B.哺乳动物 C.节肢动物 D.鱼类<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/d34787aea29f42938e43aa427d0ba1ab/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/bbb1bb8ae0cb470eb95b01e1c6b75b86/2A2FBAAA8D6617A3C5B19C11D8DB4692.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>两栖动物的呼吸器官不包括( )<br>A.肺 B.鳃 C.气门 D.皮肤<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/bcb412fa46364f6db5deb45c23c4280e/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/270c0a8492a8419f9f46ba9c3597beae/83509C6F611C1B40119F28F49FEDC452.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>哺乳动物与鸟类的共同特征是( )<br>A.两者都有羽毛 B.两者都是恒温动物<br>C.两者都是胎生 D.两者都有翅膀<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/c82213d2f3b545bdb0686e2ed7ef89bc/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/e18c93ef0a2f4a89a5220e2c61f40db6/373EB91B8586C641204516365ED8C945.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下表是一个脊椎动物检索表,表中①和④代表的动物分别可能是( )<imgA.蚯蚓和山羊 B.青蛙和蝗虫<br>C.蝗虫和青蛙 D.鲫鱼和丹顶鹤<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/e686f410e86249d7a8d4a70bd5712ed6/D9A7E0722DAB5479A60928D5B8864BC6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/2dea62d81f2644489fabf687bbc11630/498CBC2D6E7F251260009D9A9CCD767A.png"><br><br>
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