试题与答案

某探究性学习小组调查了A、B两区稻田,统计了稻螟(水稻的害虫)和青蛙(稻螟的天敌

题型:解答题

题目:

某探究性学习小组调查了A、B两区稻田,统计了稻螟(水稻的害虫)和青蛙(稻螟的天敌)的数量变化情况,并绘制成如曲线图,据图回答有关问题:

(1)青蛙属于两栖动物,稻螟属于昆虫.青蛙和稻螟在发育过程中的相同点是______.

(2)稻螟在发育过程中有蜕皮现象.这是因为______.

(3)从图中Ⅰ点开始,A区稻螟逐渐减少的原因是______.

(4)B区使用了杀虫剂甲胺磷一段时间后,稻螟的数量增长至比使用前还多,为什么?______.

(5)从中你得到什么启示?______.

答案:

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