下图为某生态系统的食物网简图,请据图完成下列各题: (1)图中

下图为某生态系统的食物网简图,请据图完成下列各题:

1)图中所有生物若要构成一个完整的生态系统,缺少               

2)在此食物链网中,就鹰而言,能量损失最多的食物链是          

3)鹰在该生态系统中占有    个营养级。

4)若此生态系统受到重金属污染,那么在体内积存污染物最多的生物是       

5)正常情况下,如果用图形表示兔数量的变化,         图是正确的。

答案

1)非生物成分   分解者    2)草→鼠→蛇→鹰

32            4)鹰           5B

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