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[机经题库答案] 托福听力 150131 CN L1题目+文本+音频+答案

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发表于 2016-10-11 17:40 |显示全部楼层
托福听力 150131 CN L1题目+文本+音频+答案分享

标题:Biology
听力文本下载:
托福听力150131 CN L1文本.pdf (197.27 KB, 下载次数: 820)
听力音频下载:
4. Biology(150131 L1).zip (9.02 MB, 下载次数: 13174)
听力题目:

1. What is the lecture mainly about?
A. Historical examples of speciation caused by barriers to gene flow
B. How barriers to gene flow can lead to changes in plants and animals
C. How barriers to gene flow affect mating behavior in related animals
D. How humans have influenced the evolution of plant and animal species

2. What point does the professor emphasize when she discusses birds and their songs?
A. Male birds often change the pace and pitch of their song to attract a mate.
B. Birds are sensitive to small variations in their species' song.
C. There is no proof that local dialects of birdsong affect behavior.
D. There is no solid evidence that an individual bird's song changes over time.

3. According to the professor, why did Elizabeth Derryberry study the white-crowned sparrow?
A. Its song has several regional dialects.
B. Its behaviors are typical of those of other songbirds.
C. Its evolution into two subspecies is well documented.
D. Its song has been recorded over many years.

4. How did Derryberry's research with female white-crested sparrows differ from her research with male white-crested sparrows?
A. Only the female birds were in cages.
B. More female birds than male birds were studied.
C. Mating songs were only played to female birds.
D. Male birds were studied for a longer time than female birds were.

5. What does the professor conclude about the results of Derryberry's research?
A. They cannot be applied to other species of songbirds.
B. They suggest that modern white-crested sparrows are dividing into two species.
C. They suggest that behavioral barriers cause speciation faster than physical barriers do.
D. They show that old technology can be used in new ways.

6. Why does the professor refer to the Great Wall of China?
Click on 2 answers.
A. To criticize a theory about speciation
B. To make a point about the speed of the speciation process
C. To identify a cause of genetic differentiation within a species
D. To point out the region's biological diversity

听力答案:
1
2
3
4
5
6
B
B
D
D
C
BC

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