2020-2021学年人教版生物七年级上册重难考点培优训练（8）种子的结构与种子的萌发
※题型：单选题※知识点：单选题※试题难度：中等<br>如图为两种被子植物种子结构模式图。相关叙述正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/9/2/4773CD40E6DC69EFB8D31B0AA80C7872.png"><br>A.甲为双子叶植物的种子<br>B.甲、乙的营养物质都储存在②中<br>C.甲、乙萌发时,最先突破种皮的是③<br>D.②③④⑤共同构成新植物的幼体<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/626df4edaeab4d4ca801688b75b84e63/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/205ad2fd3c9f468281202d46a578da97/8020280CC8ABF10780AEBBEE3D768440.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>菜豆种子结构中,起保护作用的是( )<br>A.种皮 B.胚芽 C.胚根 D.子叶<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/71c8740431824c01a54dca9a0f4dc8e5/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/6df2d84cb24547ab8713cba8ef154b5a/EA3D33FDBCE8A892E4A1A6DFDCEFB7FF.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>玉米面中的淀粉主要来自玉米种子的( )<br>A.胚芽 B.胚轴 C.胚乳 D.子叶<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/9e00fa78633c49e0b593a355588263bd/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/b3f0141a9e994a49bb4b8b5c80c6db3f/3356FBBFC6D7B49FCC5A374FC7CDFFCA.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>种子正常萌发所必需的环境条件是( )<br>①充足的阳光②肥沃的土壤③充足的空气④适宜的温度⑤一定的水分A.①②③ B.③④⑤ C.①②④ D.②④⑤<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/b2345cae911c47e9a99d16a3589b63a6/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/e7e27f057f3e42628af2b7aeed855bfb/6356A48BA2275EA2BE7D91A9FE24218A.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>种子必须具有完整的_____才能萌发( )<br>A.胚 B.胚乳 C.胚芽 D.子叶<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/f779a9ad83e54ea1bb8365b4aa4d3977/DA50F910BECBBBA4AAB35D7A1AB24524.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/df176b2dab514757a2c04c1928ca0b56/8162D25F9BC51BA5A51D38C53BD7D6DF.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>从种子萌发到长成植物体这一过程中,能正确反映体内有机物含量变化的曲线是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2019/5/10/BEE31F3A4788EEA71F82CDFD27B54A7A.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2019/5/10/DDF52BF6EF423F2C0087E4207124E211.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2019/5/10/3E3DB8652604C0FC193036702376B34F.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2019/5/10/5112CBDE34804184C306F21720006459.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/f39907932c6f4a5db710a302b4ee2982/D9A7E0722DAB5479A60928D5B8864BC6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/25605d7d17494f76a0e8dcb825998b3d/98E8DBD52BA746C05CB344B2E0CD449F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下表是蚕豆、烟草和苋菜的种子在见光和不见光条件(其他条件均适宜)下的发芽率,据表中数据判断,下列说法正确的是( )<br>?<br><tbody><br>种子<br>蚕豆<br>烟草<br>苋菜<br>发芽率<br><br>条件<br><br>见光<br>97.1%<br>98.5%<br>1.8%<br>不见光<br>96.8%<br>2.4%<br>96.6%<br></tbody><br>A.光是影响植物种子萌发的必要条件<br>B.光可以促进苋菜种子的萌发<br>C.在生产中,播种烟草种子时应该埋在土壤里<br>D.光几乎不影响蚕豆种子的萌发<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/7584f9b23a754d82913482e5b1723f38/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/2d56dbecc02e4177877545e254a3207d/BD7B27533F24C8DD409704D39FE8889C.png"><br><br>
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