2021-2022学年八年级上学期生物预习练：5.1.2 线形动物和环节动物
※题型：单选题※知识点：单选题※试题难度：较易<br>下列不属于线形动物的是( )<br>A.蛔虫 B.血吸虫<br>C.钩虫 D.秀丽隐杆线虫<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/56ce2151ca334abd9dc4510116c2f7e5/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/df7d1d3b053e44f990e8aaabb1ca0dac/CCBBCA807CE7427AFFBE0D11F01EB7AD.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>线形动物的体表有( )<br>A.刚毛 B.角质层 C.外套膜 D.外骨骼<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/c4aabbb409214b10880865fa6002f0ba/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/577822773ff343a49c1683ef1a5fdf47/99AE65408064201953DCA14BC0720727.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>线形动物的主要特征不包括( )<br>A.生殖器官发达,身体呈线形 B.体表有角质层<br>C.有口有肛门 D.身体细长,呈圆柱形<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/b9bfecec8f3e491989ae3ca959cbfecf/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/988105dfa71443d9bfebad78b4605d19/99AE65408064201953DCA14BC0720727.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列有关蛔虫的叙述不正确的是( )<br>A.消化器官简单 B.生殖器官发达<br>C.运动器官发达 D.靠身体的弯曲和伸展蠕动<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/1e2043e5a68d4af2a9a39bdbbdfff6ba/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/4750b39c7c5c470cad010e6272889dcb/5E991F0878A73E759C5BF831ED09F62E.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>儿童最容易感染蛔虫病的原因是( )A.没有养成良好的卫生习惯,喜欢吃生冷食物<br>B.喜欢伏地玩耍,喜欢吮吸手指<br>C.抵抗能力差<br>D.上述三项都是<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/F6D60FBEEC7408F841EF17C204BECFDC.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列动物中,属于环节动物的是( )<br>A.蜗牛 B.河蚌 C.蚯蚓 D.枪乌贼<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/22a80cd441464e4d8baca30f9b5bdaba/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/954a8fbada9a42779db97778a5d312ea/50F2946292C5DF7D3F9868D10210B3B1.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>蚯蚓的身体分节,它的体节的作用是( )<br>A.传递营养 B.使运动灵活,转向方便<br>C.排泄方便 D.保持体温恒定<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/96e4864778a04b078c11391b3539e34e/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/2d6a68a204744f26b794032cdd66a9b0/D2D791B8484312FF86DFC74C34C402B4.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>在观察蚯蚓的实验中,如果蚯蚓在纸上或玻璃上运动时间过长,会导致蚯蚓活动能力下降,甚至死亡,其原因是( )<br>A.体内水分散失,血液循环停止<br>B.体表逐渐干燥,无法呼吸<br>C.离开了穴居生活<br>D.神经系统遭到破坏<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/11b505cfc68b449ba3818349cf417648/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/5bd2b83a855b4f6c9a91f40a96f917b6/802C0B64A23BC27C9C29238429B8DE11.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>环节动物身体分节在进化上的意义是( )<br>A.运动更灵活 B.消化食物更充分<br>C.反应更灵敏 D.运输氧气的能力更强<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2013/06eda5d56236472392a1cbb9f7b8af2f/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2013/a30aa741b32f47dd96e541c4ee69929c/49F9A9318B7714E461CA25F67FA59ADA.png"><br><br>
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