草履虫的细胞内没有______不能自己制造有机物。-七年级生物

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• 单细胞生物仅由一个细胞构成，却能独立完成、、、等各种生命活动。-七年级生物
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• 下图是在显微镜下观察到的草履虫结构示意图，草履虫运动和取食的结构分别是A．1和3B．2和6C．4和2D．4和3-七年级生物
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• 用显微镜观察草履虫、眼虫和酵母菌，比较分析错误的是A．细胞中都没有叶绿体B．有的细胞中有明显的液泡C．都不是原核生物D．都能独立完成生殖-七年级生物
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