试题

试题 试卷

logo

题型:单选题 题类:常考题 难易度:容易

江苏省无锡市丁蜀学区2017-2018学年八年级下学期生物5月月考试卷

当实验结果与假设不相符,正确的做法是(      )
A、马上否定原来的假设 B、仔细分析原因,找出问题,重做实验 C、如实记录,照旧再做一次实验 D、修改实验数据,使结论与假设一致
举一反三
选取三枝同一植物的长势相同的枝条分别标记为A、B、C, 作如下表的处理后,分别插入相同大小的、盛有等量蒸馏水的量筒中,并以石蜡油覆盖密封水面,置于适宜环境条件下。2小时后观察记录各组量筒中蒸馏水的减少量(说明:涂抹凡士林能堵塞叶片相应部位气体进出的通道)。请回答下列问题:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 

枝条编号

枝条处理

蒸馏水减少量

A

不作任何处理

2mL

B

凡士林涂抹所有叶片下表面

0.5 mL

C

除去枝条上的所有叶片

0 mL

返回首页

试题篮