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Populations have 3 agents, namely, a birth rate, a death rate, and a growth rate. Certain insects, such as the monarch butterfl
Populations have 3 agents, namely, a birth rate, a death rate, and a growth rate. Certain insects, such as the monarch butterfl
admin
2012-11-30
34
问题
Populations have 3 agents, namely, a birth rate, a death rate, and a growth rate.
Certain insects, such as the monarch butterfly, can incorporate poisonous substances found in food plants into their own tissues and use them as ______.
选项
答案
a defense against predators
解析
参见小标题4.Coevolution下面第6句:Certain insects,such as the monarch butterfly,can incorporate poisonous substances found in food plants into their own tissues and use them as a defense against predators.
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大学英语六级
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