广西百色市田东县2019-2020学年七年级上学期期中考试考试生物试卷
※题型：单选题※知识点：单选题※试题难度：中等<br>夏天,婷婷走进十万大山,山里的玉桂花开的正浓,“玉桂树”生命活动的基本单位是( )<br>A.器官 B.系统 C.组织 D.细胞<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/ddbf8cbd9da441108d34b2a6510b89d2/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/7827b25ade2f47739e71a586cc21bae7/385EFE9513C0EBCEE879455C62CD80DC.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>如图表示细胞的有关生理过程,其中过程①表示细胞的( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/10/14/283D4ECC211AD82FACB4528F8CC1BBB0.png"><br>A.分化 B.生长 C.分裂 D.流动<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/88e68e6e2d844333bce2e56f6e4ccce5/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/6693e17a7d2a4a7a81c7d5c90d9b4c82/5380592E0EA5047084FD9024CB3ED218.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>桃的可食部分是桃的( )<br>A.果实 B.果皮 C.种皮 D.种子<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/e488e3f9716a4c2d85de63a5b7eb1978/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/ff04dcb80131436e83f7b347832ea5f3/4A2354D8C0206E369001A021ED71E910.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>如果在光线条件较差的实验室内使用显微镜,在对光时应( )<br>A.用平面反光镜 B.用凹面反光镜<br>C.用凸面反光镜 D.以上都可以用<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/a0ec26b51d484220bbbc1131c3ffd6db/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/3397cf31353a4d45ad4de252ce9a64ab/8976F31010798ED9AEBDFB568EB84E5C.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>使用显微镜时,调节粗准焦螺旋使镜筒下降的过程中,眼睛一定要看( )<br>A.目镜 B.物镜 C.镜筒 D.反光镜<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/5bb8989f886541189cd183fd7e598f81/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/91b828322a7c4082849cc0a3370d0374/62584A6B59F0F068BF4D975FB0258CC6.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>用低倍显微镜观察某装片时,如果发现视野中有一小异物,移动装片,异物并不动,转动物镜后,异物也不动,这异物可能在( )<br>A.目镜上 B.物镜上 C.装片上 D.反光镜上<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/a59852bd430b4e11bacc4184b08de2ef/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/14f21ab24a3d49139ec10ff60a465697/0BE2149ED3734598370BDCF983C30FA2.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列有关人体结构表示准确的是( )<br>A.细胞→组织→器官→系统→人体<br>B.细胞→组织→系统→人体<br>C.细胞→器官→组织→人体<br>D.细胞→器官→系统→人体<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/d97b07aeeeea483aaa3cfada4b9e954d/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/9a7a93c69da5433fa8bbb11cdb97aa4f/74802300EB7A2702E07B9CF2ADB71D94.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>切西瓜时会流出汁液,这些汁液来自于细胞的哪一个结构( )<br>A.细胞质 B.细胞壁 C.液泡 D.叶绿体<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/35693ef286aa463a8eac985f6d83da14/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/4bce848a62b143aa85c80ea074b83398/E03EC31F718A3748A63500D0152BD400.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>“藕断丝连”中的丝属于( )<br>A.保护组织 B.输导组织 C.分生组织 D.机械组织<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/3c006a89dbf44cd28f2d64c5dfd825e0/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/d9045da592aa4af8b9f71a0a2f4de9c4/CDA579FB2C2011740ADB907B991C9D21.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>植物细胞分裂的过程,正确的是( )<br>①形成新的细胞膜和细胞壁②细胞质分裂③细胞核分裂④一个细胞分成两个细胞A.②①③④ B.④①③② C.③②①④ D.②③①③<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/b3c6938f572647a996533d82fcc474bf/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/1e7a0585ab7649af8a8f1abb2fa2523c/27027021D192271136C9182911FB4E95.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>细胞分裂前后,遗传物质( )<br>A.保持不变 B.数目加倍 C.数目减半 D.成分改变<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/def131b79c874edb82ebdf2fc08f3616/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/c8c079a44f6d439e93278efb606a21c2/0286A6C40B6270A278D2E1D3B0AE40F8.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>细胞数量增多是因为( )<br>A.细胞分裂 B.细胞增长 C.细胞分化 D.细胞凹陷<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/a8f0c560b933412587631c585eb8d55e/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/b3f691cb5cc34742bdce1bd65564408f/95AB1A0E94C68C156D278D8F8B303AFB.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>孢子植物是一类不产生种子的植物,孢子指的是( )<br>A.种子 B.结构简单的种子<br>C.一种生殖细胞 D.植物的幼体<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/ef7d7c17f3a848aa9a1f9bb52f2c6c0a/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/47e3a80b5a7345fda8f6cfa0441c1c4e/1940BF0C7F0E0857AD3FEF70563A982F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列植物不属于裸子植物的是( )<br>A.侧柏 B.银杉 C.松 D.油菜<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/58a4bfd496f643e187508073e4314717/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/205e354d959545e1a263fcaf2bd57b38/62FA420EB2F743215FCD9430520AF6FF.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>小麦、水稻、玉米等粮食作物的共同特点是( )<br>①须根系②直根系③网状脉④平行脉⑤花基数是3⑥花基数是6⑦胚有一片子叶⑧胚有两片子叶A.①②③④ B.①③⑤⑦ C.②④⑥⑧ D.①④⑤⑦<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/1e44e012a48c4ffa8b6c9ad63e12c9ab/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/458245015f154399b74701159dfeafd7/C339A7863DC164C1F066AD132C3C1DC2.png"><br><br>※题型：连线题※知识点：连线题※试题难度：中等<br>请你把下列经济植物归类:<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/10/14/8D497A348C7095BE921B48A22CF24F3B.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/47ff09be34aa45cba28d9919957833b2/F23EC937F64F862958FFDBE89E0E7E29.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/5f0a89fabc614acdbbf07504e2c72c47/FF8EEE0A255827D34DDC512A788A07B0.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>细胞核是细胞生命活动的<br>,细胞核中有一种容易被碱性染料染成深色的物质——<br>,该物质内含有遗传物质——<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/07b3392e56474c39a5420c4fab19dbe3/CB6A4376257A34E6B23CE88A691C9BB2.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/7c50d7f0ffdc461d96fb1faee3e8b300/991B0FC897F5C6B39E95A050E1695B86.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>细胞壁具有<br>和<br>的功能。<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/4958e102c65c40e39c4d72d041524edf/1150415C954D9B5D2A59DF5E6E987438.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/53a9e0466e86477dab6e1cd0b8f03abe/05C05B8EB6B532773510AF437503A0B6.png"><br><br>※题型：实验题※知识点：实验题※试题难度：中等<br>根据下图,回答问题。<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/10/14/4A8DD5F33329692526DEB92D9A4D1F64.png"><br>1.据图ABCDE,请你排出正确的实验操作顺序。<br>2.在实验中为了维持洋葱细胞的基本形态,在载玻片中央滴加一滴,制作口腔上皮细胞临时装片时,在玻片上滴加一滴,其浓度为,目的是维持口腔上皮细胞的,有利于观察。<br>3.盖盖玻片时,要将盖玻片从清水滴一侧缓缓放下,目的是。<br>4.染色时,要从盖玻片的滴加碘液,用在盖玻片的另一端吸引,使染液浸润到标本的全部。<br>5.在观看洋葱表皮细胞时,要使图像从视野①变为视野②的状态,应将装片向移动;图像从②到③应该转动,换成倍物镜;图像从③到④应调节。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/64cfc4a77cbe468faa28b706381bce79/F793031398A5295F062D6F7192FA5D18.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/866d424668054b08bdcf39cdacb880a6/4CD5BF20D33D258FAE1AD5C199AF5F41.png"><br><br>※题型：探究题※知识点：探究题※试题难度：中等<br>某学校生物兴趣小组野外采集草履虫时,发现水表层的草履虫数量比深层的多。为什么会这样?请帮助他们完成分析与探究过程。<br>1.分析并作出假设:水体表层氧含量高于深层,草履虫的表膜可以完成,实现它与水环境的气体交换;结合观察到的现象,可作出假设:。2.制定并实施计划:①取甲、乙两只烧杯,加入等量的水。②取草履虫放入两只烧杯中,两烧杯中草履虫的大小和数量要,放置在相同的生活环境中。③甲烧杯中放置一个细纱网,使草履虫无法靠近水面,乙烧杯。3.分析实验现象,得出结论:一段时间后,在显微镜下观察两烧杯中草履虫的生存情况。结果发现甲烧杯中草履虫生活力降低甚至死亡,而乙烧杯中草履虫正常。据此可得出结论:。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/4293a12dab8645e581597ceb35c98d5c/EBFF5C45BCB572929BF858A650E08006.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/d1dcc3155f014cae80a2cae9b7eb8468/17C253C4CF2D4B9561F28FC0B602ACFF.png"><br><br>
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