5.1.1腔肠动物和扁形动物第1课时—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：较易<br>蛔虫消化器官不同于绦虫的特点是( )<br>A.有口无肛门 B.有小肠大肠 C.有口有肛门 D.有肛门无口<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2014/812854ab1dff40f0a76ddc444c2edcfc/D7C9A679F3C72D4F1064B7D0A0FD4AD8.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2014/43c2dfd2c99b46f498567f6571352ed3/CF98561E51C196ABC15B2014218769E3.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>涡虫背面的黑色眼点的功能是( )<br>A.形成视觉 B.形成嗅觉 C.感光 D.感受温度<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/8da0ac0a1dc64ab3b0bfca367ee67f09/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/2548bf208f3644f389013f2d393528d9/E6A440062FC5D1E9B6BB52BF98D01CDB.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列扁形动物中,能自由生活的是( )<br>A.华枝睾吸虫 B.血吸虫 C.绦虫 D.涡虫<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/8e6b4ce60fc142c8b1146b32416fce72/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/64e63ad0bbae46278436867d7aff8948/798856BC98CEAE82A5509B1C82465205.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列对日本血吸虫的描述,正确的是( )<br>A.雌雄异体 B.幼虫在水中发育,寄生在钉螺体内<br>C.成虫寄生在人体内 D.以上三项均正确<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/0e6691bc1d7d4e39a03ff657d8dc3cab/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/5ba4bcc57dc34bc7a7dcfe2cf5ff6a27/D7435BE68529C375E61D2C3C3E83BED8.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>扁形动物的主要特征不包括( )<br>A.身体背腹扁平 B.身体呈两侧对称<br>C.有口无肛门 D.有眼点<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/a25f88fa31a54770aaf57c545fe175d4/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/e8c1230534224030a6195d98f511c9b9/0DE3FA186DD52224F667A4042C1DAED9.png"><br><br>
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