草履虫是单细胞动物．______．-生物

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• 下列关于单细胞生物的说法错误的是()A．单细胞生物不能独立完成各项生命活动B．草履虫能趋利避害C．酵母菌的结构中包含细胞壁和液泡D．利用酵母菌可以制作面包-七年级生物
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• 观察草履虫装片时，常在载玻片上放少许棉花纤维，目的是A．将盖玻片垫高，使草履虫不易死亡B．使草履虫运动速度减慢C．限制草履虫的运动，便于观察D．与草履虫比大小-七年级生物
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• 单细胞生物都生活在水中．______．-生物
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• （5分)下图是草履虫的结构图，请读图并完成后面的填空：（1）草履虫生活在淡水中，靠[]___________进行运动。（2）食物通过[]___________进入体内，形成食物泡，逐渐被消化；草履虫-
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