(6分)某生物小组准备探究“鱼鳍在游泳中的作用”,甲、乙、丙

(6分)某生物小组准备探究“鱼鳍在游泳中的作用”,甲、乙、丙、丁四个同学一人一个意见,请你分析其中蕴含的科学道理:

(1)甲提出的方法在科学研究中叫做                 
(2)丙的观点说明每组对照实验应探究___      种条件对研究对象的影响。
(3)丁的实验方案中,B处理探究___        _在游泳中的作用。
(4)假设鱼主要靠尾鳍控制运动方向。请你设计一组对照实验验证:
将鱼分成两组,实验组的处理:__      __,对照组的处理:__      __。预计实验结果是:__       __组的鱼不能正常转弯。

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