问题 实验题

下图是某一草原生态系统的主要成员及食物关系,请据图回答:(13分)

(1)图中所示的是生态系统中的         其中属于生产者的是        ,属于消费者的是        。

(2)该生态系统共有  条食物链,它们交织在一起构成        ,它们是相互关联的,其中最长的一条是:                 

在这条食物链中生产者是        ,初级消费者是        ,次级消费者是        ,最高级消费者是         。如果环境中有污染,则体内有害物质含量最高的是        。

(3)此生态系统中数量最多的是        。

(4)如果在这一平衡的生态系统中,过度捕猎狐和鹰,则肯定会造成       的数量大幅度上升,使       受到危害。

答案

(1)生物成分  草  兔、狐、鼠、蛇、鹰

(2)5  食物网  草→ 鼠→蛇→鹰   草  鼠  蛇  鹰   鹰

(3)草

(4)兔  草

食物网中包括生产者和消费者,生产者和消费者是生态系统中的生物成分,绿色植物是生态系统中的生产者,动物是消费者,食物网是由食物链相互交叉连接起来,就形成一个复杂营养关系的网状结构,其中最长的食物链是草→ 鼠→蛇→鹰,草是生产者,鼠是初级消费者,蛇是次级消费者,鹰是最高级消费者,有害物质通过食物链积累,所以鹰的体内有害物质含量最多,生态系统中数量最多的是植物,过度捕猎狐和鹰,那么兔会因为缺少天敌数量剧增,那么草会受到危害。

阅读理解
阅读下列应用文及相关信息,并按照要求匹配信息。
首先请阅读下列媒体上的插图及提示性文字:
A.Reese Witherspoon poses with her children Ava (L) and Deacon at  ceremonies unveiling her Hollywood  Walk of Fame honor
  B.Cuba dancers emanate concern to
AIDS
            
C. The UEFA EURO 2012 official mascots 
are presented during an unveiling 
ceremony in Warsaw
  D.Students take part in a bubble fight 
as part of the traditional Raisin
Monday celebrations
                         
E. Best wishes to the top 10 celebrity couples 
who have tied the knot since 2010
  F.Celebrities flock to Miami for the Super   Bowl
          
以下是关于这些插图的简要评论。请把评论与相关插图及提示性文字匹配起来。
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问答题 简答题