某生物实习小组的同学用河水、洗净的砂、草食性小鱼、广口瓶、凡

某生物实习小组的同学用河水、洗净的砂、草食性小鱼、广口瓶、凡士林等材料制作生态瓶。下列说法错误的是(    )

A.乙瓶中的生物存活的时间相对较长                      B.甲瓶中抵抗力稳定性最弱

C.制作生态瓶时应放入少量的尿素                        D.生态瓶一定要密封、透明

答案

B


解析:

丙瓶缺少能量的供应,其抵抗力稳定性最低,甲瓶中由于初级消费者数量多于乙瓶,且两瓶中生产者数量相同,因此乙瓶抵抗力稳定性最强。

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