2020-2021学年七年级生物上册苏教版同步课时作业3.5.1植物种子的萌发
※题型：单选题※知识点：单选题※试题难度：中等<br>种子结构中胚的组成是( )<br>A.胚芽、胚轴、胚根、子叶<br>B.胚芽、胚轴、胚根、胚乳<br>C.胚芽、胚乳、胚根、子叶<br>D.胚乳、胚芽、胚轴、子叶<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/70ea96869ea44f9698dbd858053098d2/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/58d1788e98a34b2e89d170672a3ed2aa/0A8B0AB64F66EFB509F0A37BF2DAA854.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列结构中,既能贮存营养物质又是胚的一部分的是( )<br>A.胚根 B.胚轴 C.胚芽 D.子叶<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2018/7b6f6e9b0af44c08bd596af88ea08eba/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2018/6c89c734ec574746b172f364dc80a0a5/9CAFCC34E95295EF0334A8E1583334FD.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下面是四粒玉米种子.阴影表示被虫吃掉的部分,其中放在适宜的外界条件下可能还会萌发的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2019/6/25/053F9434CA0279F531FAE346A4E3A2A3.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2019/6/25/D0ECDAD6980A5102B80B93E660802B4B.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2019/6/25/56A486F962AA896526F1A0B25EB20B6F.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2019/6/25/BA8585E95FBB612E4A73403F912B07D1.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/5a595e7a0d7c49099a08ea8c1174454f/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/0a97bb578d3f475696ddcaecbabe6ed0/DFA87C4C30CD2B360001D5A7F599E007.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>在菜豆种子的萌发过程中,首先突破种皮的结构是( )<br>A.胚根 B.胚芽 C.胚轴 D.子叶<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/4c2b8603d854422da31e3299c4cdfde4/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/c456cd92d51a4abaa5f6c3ed52eeefb2/E7AD6C8D557BC2F36C70D7429B1C6806.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>种子中的幼小生命体是( )<br>A.胚 B.胚芽 C.胚乳 D.子叶<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/89e4e9cac78c43bb92bb7eed17948cb5/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/e53b57cf69ba4dcc87341b0efcdddc46/A5E184F49127ACFB9FC38B01834565B5.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>种子萌发需要的外部条件是( )<br>A—定的水 b适宜的温度 c充足的空气 d光照A.abd B.abc C.acd D.bcd<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/4502ef03614f49eda6792d3a81f9cb2e/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/e0088fa19bbb4df486670e2c3ce2856a/BE5245BA314ED16A1A91563CF058CC1E.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>播种前,需要耕和耙使土壤变得疏松,这是为种子萌发提供( )<br>A.—定的水分 B.充足的空气 C.较强的阳光 D.温暖的环境<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/218881d1303945d2a9a7cc293decb5aa/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/3a4d589929374162990de3d78c983cbb/A99BCDFBAD728E8B00147FE5896B7260.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>储存在粮仓里的小麦种子一般不会萌发,主要原因是( )<br>A.缺少水分 B.温度较高<br>C.缺少阳光 D.缺乏营养物质<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2018/274b5a3f20674966812506abefe811ee/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2018/bb514bc44ae24d8d97985278901efbb5/98C8B6DF1208915B391E22B35BC92492.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>如下装置是某同学用来探究种子萌发所需的外界条件,下列叙述正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2019/5/14/354B7D631208D7D6DC9484CEB76836E5.png"><br>A.①和③构成对照实验,可探究种子萌发需要水分<br>B.②和④构成对照实验,可探究种子萌发需要的内部因素<br>C.②和③构成对照实验,可探究种子萌发需要适量的水分<br>D.①和④构成对照实验,可探究种子萌发需要的内部因素<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/04ebe05b693f432a872de5b53e9e9e37/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/baef97fc2ad8423284b6c04ccdd9c7ff/887788EF8E615CEBEBCD457DBFC07E70.png"><br><br>※题型：读图填空题※知识点：读图填空题※试题难度：中等<br>写出图中各部分结构的名称:<br><img src="https://picture2.zhihuicn.com/testImage/2/2019/7/16/8255416F60ACB110EEA3B944EF2D7995.png"><br>1<br>;2<br>;3<br>;4<br>;5<br>;6<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/a0a87e5c191e438c821f6c6faf5bd705/6A703FFC92C623FA6D5F4F83E5F12069.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/310658d88c2b44f5ae7c160370a0838a/137BDDA694969F53C45E5F8A37972A06.png"><br><br>※题型：实验题※知识点：实验题※试题难度：中等<br>某组同学<br>以颗粒饱满的大豆种子为实验材料对种子萌发所需的条件进行探究<br>实验设计与实验结果如下表。请你分析回答问题<br>:<br><tbody><br>实验组<br>温度(<br>℃<br>)<br>湿度<br>空气<br>种子数(粒)<br>发芽率(%<br>)<br> A<br> 26<br>潮湿<br>充足<br> 50<br> 96<br> B<br> 5<br>潮湿<br>充足<br> 50<br> 2<br> C<br> 26<br>干燥<br>充足<br> 5<br> 0<br></tbody><br>1.请你指出该组同学在实验设计中存在的不足并加以修改。<br>2.实验中设置A组的目的是与其他组形成。<br>3.按修改后的方案进行实验,探究水分对种子萌发的影响,应用A组和组进行对照实验。<br>4.用A、B两组作对照时,所探究的是对种子萌发的影响。<br>5.在适宜的环境条件下,A组也有未萌发的种子,可能的原因是。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/a4458eb6f0364246ada1f20975f31554/70E0F6F066025FBE193AE4EEC73FA29D.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/ed73548d3eee4c97b5744619b6ae8554/2BABC7932017173FF34A53395628E37F.png"><br><br>
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