单选题What can be inferred from the example of the ant-lion in the first paragraph?AInstincts of animals can lead to unreasonable reactions in strange situations.BWhen it is engaged in a chain actions it cannot be interrupted.CEnvironment and heredity are two supplementary factors in the evolution of insects.DAlong the lines of evolution heredity becomes less and environment more important.

单选题
What can be inferred from the example of the ant-lion in the first paragraph?
A

Instincts of animals can lead to unreasonable reactions in strange situations.

B

When it is engaged in a chain actions it cannot be interrupted.

C

Environment and heredity are two supplementary factors in the evolution of insects.

D

Along the lines of evolution heredity becomes less and environment more important.


参考解析

解析:
本题可参照第一段中间一句话“if such a lonely animal is engaged upon a chain of actions and is interrupted, it either goes on vainly with the remaining actions ... or dies in helpless inactivity”,从中可知,蚁狮会执著地做出本能的反应。因此B项为正确答案。

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