2022年2018济南版生物七年级上册1.2.2《细胞的分裂和分化》教案 .pdf

名师精编优秀教案观察生物结构1.2.2 细胞的分裂与分化一、教学目标(1)描述细胞分裂的基本过程；(2)说出分化和组织的概念；(3)概述生物体的各种组织是由细胞分裂和分化形成的；识别植物的几种主要组织，识别人体的几种基本组织；二、课时安排1 课时三、教学重点细胞分裂的基本过程四、教学难点细胞分化形成组织。五、教学过程（一）导入新课课堂开始前，给大家提供了两个材料，你知道他们之间又怎样的关系吗？一粒小小的种子发育成了一株完整的番茄植株，那么可爱的同学们又是如何发育来的呢？来看看我们最初的样子，一个受精卵，同学们，你知道这样一个小小的细胞想要发育成复杂的人体，他都发生哪些变化呢？很多同学对于细胞的生理过程有了一定的认识，大家事先预习，很好的习惯。那么大家说的对不对呢？咱们今天就一起一番茄为例，开启细胞分裂和分化的探究之旅。（二）讲授新课探究一：细胞的分裂名师精编优秀教案阅读教材 31 32 页文字资料，思考：1、分裂时细胞核有什么变化？2、植物细胞分裂时，在两个细胞核中央形成什么？3、分裂时细胞质分成两份吗？4、描述植物细胞、动物细胞的分裂过程？5、什么是细胞的生长？探究二：细胞的分化阅读教材 32 33 页文字资料，思考：1、什么细胞的分化2、细胞分化的结果是什么？3、植物有哪几种组织？4、动物有哪几种组织？（三）知识运用1生物体细胞数目增多是细胞_的结果。2“叶脉书签”所属的组织是（）A营养组织B分生组织C保护组织D输导组织（四）归纳小结一、细胞分裂的过程文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 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ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10名师精编优秀教案第一步：细胞核一分为二；第二步：在两个细胞核中央形成新的细胞膜和细胞壁（动物不形成细胞壁），将细胞质一分为二。二、细胞的分化细胞分化形成了不同的细胞群（组织）植物组织：保护组织、输导组织、营养组织、分生组织、机械组织动物组织：上皮组织、神经组织、肌肉组织、结缔组织（五）随堂检测1如图表示细胞分裂与分化的过程，下列叙述不正确的是（）A表示细胞分裂，表示细胞分化B人体由小长大与细胞的生长、分裂和分化有关C细胞分化形成不同的组织D使细胞数目增加，可导致细胞中的遗传物质改变2如图表示细胞的几种生理过程，以下叙述错误的是（）A表示细胞的生长过程B通过形成了不同的组织-文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 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HG9X4M6Y6N4 ZC3A8D1V5L10名师精编优秀教案C导致遗传物质发生了改变D表示细胞分裂，结果是细胞数目增多3绿色植物茎内形成层细胞分裂时（）A细胞膜先分裂，最后细胞核分裂B分裂过程受细胞核内遗传物质的控制C细胞核内遗传物质先均分后复制D产生的子细胞内染色体的数目会减半六、板书设计第二章观察生物结构第二节细胞的分类和分化一、细胞分裂的过程第一步：细胞核一分为二；第二步：在两个细胞核中央形成新的细胞膜和细胞壁（动物不形成细胞壁），将细胞质一分为二。二、细胞的分化细胞分化形成了不同的细胞群（组织）植物组织：保护组织、输导组织、营养组织、分生组织、机械组织动物组织：上皮组织、神经组织、肌肉组织、结缔组织七、作业布置细胞分裂后新细胞与原细胞的遗传物质发生了改变_（判断对错）预习 35 37 多细胞生物体的结构层次文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 ZC3A8D1V5L10文档编码:CT9G2M3A7O10 HG9X4M6Y6N4 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