2020-2021学年北师大版八年级上册生物单元测试AB卷 第十九章 生物的生殖和发育 A卷 基
※题型：单选题※知识点：单选题※试题难度：较易<br>男性体内能产生生殖细胞的器官是( )<br>A.睾丸 B.阴茎 C.阴囊 D.前列腺<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/fb3baab86255412b8db12ab9888614fb/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/2a2127e5bd0c480b8cef8056286fa384/CAE074B0CF17F8559E730C6A3322F44F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：容易<br>人类生命诞生的起点是( )<br>A.受精卵 B.卵细胞 C.胎儿 D.婴儿<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/7df3cc7ffa5f468ba8c4797c3588570c/DA50F910BECBBBA4AAB35D7A1AB24524.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/2dd364f9615847e183de120f87d7f452/32988260BFF97553BB0BA439EEEB8478.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列关于青春期身体变化的叙述中,错误的是( )<br>A.身高增长加快 B.智力发展迅速<br>C.生殖器官形成 D.女孩出现月经<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/86a2a097304c4e3784bd2c141da889bd/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/b0f10b95cbab4f1c87116b5596dccd58/C4B2BEAC9FEED50C2619A75EB314C906.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>处于青春期的男孩和女孩,在生理和心理等方面都发生着显著的变化。青春期不提倡的是( )<br>A.生活要有规律,积极参加文体活动<br>B.与异性正常交往,男女相处有礼有节<br>C.少吃刺激性食物,避免声带发生病变<br>D.面对心理困惑,拒绝向任何人倾诉<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/ac8775355f054274a7bf89340cda6040/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：较易<br>菜粉蝶的发育过程是( )。A.卵→若虫→成虫 B.卵→幼虫→蛹→成虫<br>C.卵→成虫 D.卵→蛹→成虫<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/8cd92ab1bb854381ae9da256f1972ed9/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：较易<br>鸟卵的卵细胞不包括下列哪一项( )<br>A.卵白 B.卵黄 C.卵黄膜 D.胚盘<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/01f44514c20b4c4ab8ea6272fbe6ba1b/DA50F910BECBBBA4AAB35D7A1AB24524.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：较易<br>山茶油是深受人们青睐的绿色食品。在深秋时节,将摘下的油茶果(如图)晒裂、取出种子,晒干、炒熟、压榨等,即可的纯天然的山茶油。由此推断油茶的生殖方式是( )<img src="https://picture2.zhihuicn.com/testImage/2/2019/6/21/DB4DC570AC0D2DB94068D6909C8886AB.png"><br>A.有性生殖 B.营养生殖 C.分裂生殖 D.无性生殖<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/27ea03d464b7427384708f30c46bfaa5/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/605a7952457847c193c5e9823f64337a/A9A868399CBDC95E862F4B557C134CA5.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列植物繁殖方式,不属于无性生殖的是( )<br>A.黑枣和柿树嫁接 B.小麦种子繁殖<br>C.椒草叶片长成新植株 D.杜鹃花枝条扦插<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/5b40641b904e41ea974387e8dd3de858/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/2e4fd09ba9c34034b9cd9361d71d32e9/B1D8A13965E1634445A85ADE77146FFD.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>如图是家蚕发育的全过程,据图回答以下问题:<img <br>1.我国古代就已掌握养蚕缫丝技术,用热水浸泡蚕茧进行抽丝,蚕茧处于家蚕发育的_______阶段,家蚕的发育属于_______.<br>2.蝗虫与家蚕相比,发育过程缺少_______阶段,蝗虫的发育属于_______.蝗虫对农作物危害最大的阶段是_______.<br>3.蝴蝶一生也经历大致四个阶段,你一定知道对农作物危害最大的阶段是( )<br>A.蝴蝶成虫<br>B.蛹<br>C.幼虫<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/c36f7681e0ec4116b0f78b048ee58bfa/8C5148DE4ADC5C3B0B8E6B02FEE9B6A5.png"><br>解析<br>略<br>
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