2021-2022学年生物人教版七年级上学期预习练：3.2.1种子的萌发
※题型：单选题※知识点：单选题※试题难度：中等<br>张大妈播下花生种子后,连续几天降雨导致水浸田,造成出芽率低,其原因主要是( )<br>A.温度偏低 B.缺少阳光 C.缺少空气 D.缺少肥料<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/f1aa2b238e94491cb97aedc59342d130/D7C9A679F3C72D4F1064B7D0A0FD4AD8.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/0ebac115aaab4a4ea43e4f570f32eebb/D37387C345CD38FAB24258427B7013B2.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>月球环境恶劣,是生命的禁区。但我国嫦娥四号搭载的棉花种子顺利萌发,摘下了“月球第一片嫩叶”的桂冠,科学家不必为种子萌发提供( )<br>A.适量的土壤 B.适宜的温度 C.一定的水分 D.充足的空气<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/ab9264b814d642258c4af9d776c8d79d/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/8686689c3c13477086b5f1e08b690356/820DAC83CEBEF303BBDFAAD99BFA4FBB.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>某同学在两只同样的花盆中种下蚕豆种子,并设计了如下探究的实验,从该实验可知:这位同学研究的影响蚕豆发芽的因素是( )<br><tbody><br>花盆<br>光线情况<br>温度<br>水<br>甲<br>向阳处<br>5℃<br>充足<br>乙<br>向阳处<br>20℃<br>充足<br></tbody><br>A.阳光 B.空气 C.水分 D.温度<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/f78e530a07ca4bb78c23c767e8980e31/B4A95E0049EF7D88C3ABD6FDD51A35AE.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/246a1cd04f794958b2b6ca10e1ca2039/A2B980F1730DDEF04646FA62EB508881.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>在一则伊索寓言中,国王将炒熟的种子发给他女儿的求亲者,让他们去种植,借此考察谁更诚实。炒熟的种子不能萌发是因为( )<br>A.种子处于休眠期 B.胚不完整<br>C.胚是死的 D.温度不适宜<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/5ba6669adb1747a7b2e783d5f2a28e44/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/2b63df0b148e4406a5c3269f261fa3f8/5B334625ABC59B8850385006DB9E6C9D.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>种子的休眠有利于( )<br>A.保存养料 B.种子的成熟 C.适应环境 D.提高发芽率<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/b08d2cf4d77f4fbabba84d7bac804a31/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/0c523f11df5f4fa0a0779374fb8268e1/C80198A96107356165A01E7836BC8955.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列有关种子萌发过程的有关说法错误的是( )<br>A.胚根最先突破种皮,发育成根<br>B.胚芽最先突破种皮,发育成茎和叶<br>C.胚芽发育成茎和叶<br>D.胚是种子的主要部分,是新植物的幼体<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/c31c38e9c39a4fd5b080b3ba22bea837/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/f8e513122bb1484f940b65a12cd5b1e2/6018811F8BB5EE7AD57108DD263D0FD4.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列有关种子萌发的叙述,正确的是( )<br>A.只要外界环境条件适宜种子就会萌发<br>B.种子萌发初期细胞的干重会降低<br>C.种子萌发的营养直接由光合作用提供<br>D.种子萌发时最先突破种皮的是胚芽<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/3e799aeeaf6e4a6db4ab334731b93e70/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/a9ce3232da634ad49a881de7534457a0/87F7EEACE8F455CF53058C22850C0190.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列关于测定发芽率的说法,正确的是( )<br>A.测定发芽率要保证完全准确,最好检测所有的种子<br>B.测定发芽率时应当尽量挑选个大的种子才能保证发芽率高<br>C.测定发芽率要保证种子正常萌发的环境条件<br>D.测定发芽率要尽量节省种子,所以随便挑几粒种子测一下就可以了<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/2b60f60aa05548ffaf54cabfb534be3f/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/b5bd3f34c48243648dd2ea12c157852e/FC18259CDEC2483F3BD334A370667365.png"><br><br>
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