Delta备考策略与模拟试题 Quiz 7 口语 Question 4 重新选题

阅读材料

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Coevolution

Coevolution is the joint evolution of two species that are dependent on each other. Each species influences the other, so they evolve at the same time. Coevolution is a result of complex interactions involving mutual evolutionary changes. A change in one species acts as a selective force on another species, which adapts in response. The adaptation in the second species, in turn, is a selective force on the first species. Hence, the two species trade adaptations and evolve together. Coevolution often occurs when both species receive a benefit, such as a higher rate of survival.

听力材料

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口语题目

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Use the examples from the lecture to explain the concept of coevolution.

答题辅导

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1、题目关键词：examples, explain

2、答题要领：

(1)summarize the concept of coevolution.

(2)use specific examples in the lecture to explain.

3、阅读材料要点：

(1)Coevolution is the joint evolution of two species that are dependent on each other.

(2)The two species trade adaptations and evolve together.

(3)Coevolution often occurs when both species receive a benefit.

4、听力材料要点：

(1)Coevolution can be seen in the interaction between insect and flowering plants. Both species benefit.

(2)Insects evolve features to best fit the flowers and the flowers evolve features to attract insects.

(3)Some flowers evolve a particular shape in order to benefit a particular pollinator.(spurs, tubes, landing platform for a certain bee)

5、模板：

(1)In this set of materials, the reading passage is (the title of the reading passage) and the listening material is a lecture on this topic.

(2)The reading material mainly introduces ...

(3)In the listening material, the professor discusses ...

(4)First,... Second,...