2020-2021学年人教版七年级上册生物课堂小测 2.2.1细胞通过分裂产生新细胞
※题型：单选题※知识点：单选题※试题难度：中等<br>甲、乙两图表示的细胞生命活动分别是( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/8/13/7C966183B90284A070AEB476EB54A521.png"><br>A.分化、分裂 B.分裂、生长 C.生长、分裂 D.生长、分化<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/4be86b5da00b4b9ba07c5abfd2cf23c2/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/9d7b6e8268114fe1855ea6739bfe6c02/AEEE8B0E54018EB18D16223816794AC6.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>植物体之所以能够由小长大是因为( )<br>A.细胞数目增多 B.体积增大<br>C.细胞分裂和生长 D.细胞分化<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/ed3151a97259494dbef5e00ed1133974/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/b533770f6f6142eda2700080d8b09da4/AFDAB9BF241C10BCD2241CD41161B57C.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>个体发育过程中,细胞数目增多是依靠( )<br>A.细胞分裂 B.细胞分化 C.细胞衰老 D.细胞凋亡<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/05b7a8efee1a48d88192f322be7d27af/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/54dbdfa95c7f433a885232386bf19eb9/2FC16B12531417FCD58A60BCAAB77606.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>染色体的主要组成成分是( )<br>A.蛋白质 B.蛋白质和DNA C.DNA D.葡萄糖和DNA<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/6ec45ac48bb2484aa7f823d17ce893c9/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/673ff640a66542849c1c965a265a440d/450FB4BD86AD978C5BC6B21683245067.png"><br><br>
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