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【简答题】
下图中表示几种生物的基本结构单位，请根据下图回答下面的问题。 (1)最有可能属于病毒的是_______，它在结构上不同于其他三种图示的显著特点是_______；病毒的生活及繁殖必须在______内进行。 (2)图中属于细胞的是_____，它在结构上不同细胞的最显著特点是_______，与细胞的统一性表现在_____________________。 (3)图中能进行光合作用的是[ ]_______，能完成此生理过程的物质基础是因为其内含有_______，因而它是一类营______生活的生物。 (4)___图展示了哺乳动物的平滑肌细胞，其遗传物质在存在不同于其他三种图示的特点为______。 (5)其他图示中与图B中[4]相似的结构是___________(填图序号及标号)。
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