2020-2021学年八年级下册生物人教版同步课时作业（1）植物的生殖
※题型：单选题※知识点：单选题※试题难度：中等<br>植物的有性生殖过程中,要实现开花、结果的生理过程,必须要经历的两个重要环节是( )<br>A.传粉和受精 B.开花和传粉 C.受精和结果 D.开花和结果<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/7c26992ac9ba49fd9af8032d8249d06a/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/256e15e8d0a74183ad471fd2474307ba/873FEA43C821A4F871974B35C60DA347.png"><br><br>※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属于有性生殖的是( )<br>A.扦插 B.嫁接 C.组织培养 D.人工授粉<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/77df605ba5134ddda51fc866b646fb56/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/d11c05f8ba414c51b483267d0186067d/714C39F47E2D955B34054EC7AE9EA7C9.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列属于有性生殖的是( )<br>A.兰花的组织培养 B.水蜜桃树的嫁接<br>C.豌豆的种子繁殖 D.生姜的块茎繁殖<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/236247e913234dd982a5ce5609e2b156/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/e7502d27f02842fbb7f0c586622430b5/36E408EA4EEA379AF80B23690D9A4117.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>香蕉是我们常食用的水果,在食用时你会发现香蕉果肉中间有许多的黑点,实际上这些黑点是香蕉已经退化的种子,由此推断香蕉的生殖方式是( )<br>A.有性生殖 B.孢子生殖 C.分裂生殖 D.无性生殖<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/0ecc4a36b9294bc6b12879e82de8c969/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/ec2c80763a3f48eba21365865a819aa2/59BB2607F6DA6D41DEF8F5404277038B.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列繁殖方式,属于无性生殖的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2020/12/10/5489ED7E789D0481BCBE01D38B5587A8.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2020/12/10/829BFF213F63198894435FA4FE6C5C68.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2020/12/10/81701B2F110F08EF517EF91095D462A4.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2020/12/10/C3B7EC3FD2138EDCD2ED23A130F0A5B8.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/15b9197c2f13407b9b62f53ad6a787bf/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/8957ae6869f648e6acbfd146d9e5539e/9D7F64CBD15E549864ABCB86B150BD63.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>部分果农用甜李子做接穗,酸李子做砧木来改良李子树的品种。果树成活后,结出的果实( )<br>A.是酸李子 B.有的酸,有的甜<br>C.是甜李子 D.酸甜度介于两者之间<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/0e6d1b57e25f4f3395e025f654496fe4/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/5189f7e78e0645eb86fa410c760b7190/0C70A489E565DDBA18082E6FE1885799.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>利用扦插、嫁接等方法繁殖花卉或果树,最主要的优点是( )<br>A.保留了亲代的优良性状<br>B.后代有较大的变异<br>C.适应环境的能力更强<br>D.后代具有双亲的遗传特性<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/cc54859cfa90459aa227a1b1e4482f9d/DA50F910BECBBBA4AAB35D7A1AB24524.png"><br>解析<br>略<br>※题型：读图填空题※知识点：读图填空题※试题难度：中等<br>如图是<br>苹<br>果树栽培常用的方法,<br>①<br>为苹果树的枝条,<br>②<br>为海棠树干,<br>请据图<br>回答下列问题。<br><img src="https://picture2.zhihuicn.com/testImage/2/2019/7/9/BF2B16BE4A060F29407A24B658FEE790.png"><br>1.这种利用嫁接来繁育优良品种的方式属于 生殖。<br>2.嫁接时要将①和②的 紧密结合,以确保①成活。<br>3.图中②是,新形成的植株所结果实将表现出 的优良性状。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/905ff2fb6fa14dd38a05eb1abf27e588/14A04B60D63BDF03FB8244C6D9ABBDC6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/f197561c70fe459da2079d5b4b82228e/C50410A5FE287FE0C5E8638B65E7C963.png"><br><br>
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