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(8分)下图示为某种群在不同生态环境中的增长曲线,请仔细分析图中曲线后回答下列问...

(8分)下图示为某种群在不同生态环境中的增长曲线,请仔细分析图中曲线后回答下列问题:

说明: 6ec8aac122bd4f6e

(1)(2分)处在一个理想的环境中,没有资源和空间的限制,种群内个体增长曲线是________(填代号);当种群置于有限制的自然环境中,种群内的增长曲线是___________。

(2)2分)影响种群密度的主要因素是种群的_______      和___________     

(3)下列对阴影部分的解释正确的是(   )

①表示环境中影响种群增长的阻力  ②表示环境中允许种群增长的最大值

③表示种群内迁出的个体数        ④表示通过生存斗争被淘汰的个体数

 

(1)(2分)a   b(2)(2分)出生率  死亡率 (3)(2分)①④ 【解析】
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