题干

如图是某同学用紫色洋葱鳞片叶外表皮细胞做“植物细胞的吸水与失水”实验中所观察到的细胞图,下列叙述正确的是(     )

 

A:图中1、2、6组成了细胞的原生质层

B:此时6处的浓度一定大于7处的浓度

C:图中1是细胞壁,6中充满了外界溶液

D:图中7是细胞液,在细胞发生质壁分离过程中,其颜色逐渐变浅

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C

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    Join a sports team at school or out of school. Just exercise! Studies show that people who get active in their teens will be more active when they're adults, so start getting active now.