2020-2021学年人教版七年级上册生物课堂小测 3.2.3开花和结果
※题型：单选题※知识点：单选题※试题难度：中等<br>桃花花托上生有四个结构,从内向外依次是( )<br>①花瓣②雄蕊③萼片④雌蕊<br>A.①②③④ B.④②①③ C.④③②① D.③②④①<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/e89355473a5342b4940e2db5a2dd45a8/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/bc265cc0104a474996e7fd0e880e22ea/43A0AC29205D09C5BE26F7F143FD0F0F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>花粉是在花的哪个结构里产生的( )<br>A.柱头 B.花药 C.子房 D.花柱<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/236332fe6e694d20aeb9fd63fbfc95af/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/be6000d4089842bab3fcf0325853f1dc/AD251AE67F33560C800769EC582E9D52.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>雌蕊由下列哪几部分组成( )<br>A.柱头、花柱、子房 B.柱头、花柱、胚珠<br>C.花药、花丝、子房 D.花萼、花被、柱头<br>答案<br><img src="https://picture1.zhihuicn.com/Answer/2/9/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture1.zhihuicn.com/Explain/2/9/137CF2EAF788058BBBB1B25C0A993E1F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>一朵桃花中,与果实和种子的形成有直接关系的结构是( )<br>A.花托和花柄 B.花冠 C.雄蕊和雌蕊 D.花萼<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/3507945ab1ee4f3ab509a0dc883ea6a6/06CA09E70C17EF8BA2D3B8C70D693953.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>“墙角数枝梅,凌寒独自开。”梅花结构中能发育成果实的是( )<br>A.子房 B.子房壁 C.胚珠 D.受精卵<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/617a7c47f0b748e580bd56a8a25be13e/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/974c5edde89b4183b467c0d707ceea40/DF8483DCAC7444B3D34E2FA41B1EF948.png"><br><br>
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