2020-2021学年八年级下册生物人教版单元测试AB卷 第七单元第一章 生物的生殖和发育 A
※题型：单选题※知识点：单选题※试题难度：中等<br>下列植物的繁殖方式中,属于有性生殖的是( )<br>A.椒草、秋海棠用叶片繁殖<br>B.月季、葡萄的扦插繁殖<br>C.桃、柿树的嫁接繁殖<br>D.向日葵、玉米的播种繁殖<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/b24c0990ca5d48b9b3a25631383923c6/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/20654d5a0d8741c49e19792251b5e8e0/2877C8C486090914445B88C966642E99.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列生物的生殖方式为无性生殖的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2019/9/4/C4523B496ED52E6EE28A7B3DC64E6FE4.png"><br>A.②③④ B.①②③④⑤⑥<br>C.③④⑤⑥ D.①②④⑥<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/5b8ac0bbc540486586b941b811f0d2ec/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/f00384a11ecc48a2b3131e12f2b1c8b4/B8E7B75B94AE123B6EC3131593811964.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列不属于组织培养优点的是( )<br>A.能够培养出新品种<br>B.可以培养出无病毒植株<br>C.可以保持亲本的优良性状<br>D.可以短时间内大量繁殖植物<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/fc6b6bcff0574dba84910638ca78c501/E7F0EDF83F40244C8F0C84B97471AED6.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>如图是家蚕发育过程示意图,与家蚕发育过程类似的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/7/11/D89AC940B4B73F43FEE16176DA8977A1.png"><br>A.蟋蟀 B.蝗虫 C.蝴蝶 D.螳螂<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/225dcc6d69f949718973753403e7ca63/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/9397f991fb8548e18624b697b6c52204/3F75996E567265157B1AB9879D0F3BC5.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>果蝇的发育过程( )<br>A.蛹→受精卵→幼虫→成虫<br>B.受精卵→蛹→幼虫→成虫<br>C.蛹→幼虫→成虫→受精卵<br>D.受精卵→幼虫→蛹→成虫<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/d9f8d241fb3c47e8b0c0e752dbdad654/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/5188b9d5543d4f3eab139162eb2840f3/8B38C5D3443AE5E1985BB1C861248622.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列有关两栖动物的叙述正确的是( )<br>A.青蛙个体发育为变态发育,发育的起点是雌蛙体内的受精卵<br>B.青蛙和蝗虫生殖发育的共同特点是有性生殖、卵生<br>C.既能生活在水中又能生活在陆地上的动物叫做两栖动物<br>D.青蛙有抱对交配行为,生殖发育摆脱了水的限制<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/0840f5ad718d494a8ae015c38f3b57cc/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/574184deb310483392386b0de10e5132/1415C75CE9691A8742A6022FB34A783F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列关于鸟卵的结构与功能的说法,不正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2019/4/30/ECD37F677ED6A094989E9B527A34D28C.png"><br>A.为卵壳,起保护作用<br>B.为胚盘,所有胚盘都能发育成胚胎<br>C.为卵黄,是胚胎发育的主要营养来源<br>D.为卵白.为胚胎的发育提供营养和水分<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/839dbe300a2343539c87357f0e50b3b6/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/0ab532894f7a4f6b8c9cfee0a0ba9f0f/B8E1E46780298803569D98584F66E990.png"><br><br>
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