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Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【B1】______a study
Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【B1】______a study
admin
2019-05-25
49
问题
Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is【B1】______a study, published from the University of California and Yale University in the Proceedings of the National Academy of Sciences, has【B2】______.
The study is a genome-wide analysis conducted【B3】______1,932 unique subjects which【B4】______pairs of unrelated friends and unrelated strangers. The same people were used in both【B5】______.
While 1% may seem【B6】______, it is not so to a geneticist. As James Fowler, professor of medical genetics at UC San Diego, says, "Most people do not even【B7】______their fourth cousins but somehow manage to select as friends the people who【B8】______our kin."
The study【B9】______found that the genes for smell were something shared in friends but not genes for immunity. Why this similarity exists in smell genes is difficult to explain, for now.【B10】______, as the team suggests, it draws us to similar environments but there is more【B11】______it. There could be many mechanisms working together that【B12】______us in choosing genetically similar friends【B13】______"functional kinship" of being friends with【B14】______!
One of the remarkable findings of the study was that the similar genes seem to be evolving【B15】______than other genes. Studying this could help【B16】______why human evolution picked pace in the last 30,000 years, with social environment being a major【B17】______factor.
The findings do not simply corroborate people’ s【B18】______to befriend those of similar【B19】______backgrounds, say the researchers. Though all the subjects were drawn from a population of European extraction, care was taken to【B20】______that all subjects, friends and strangers, were taken from the same population.
【B12】
选项
A、limit
B、observe
C、confuse
D、drive
答案
D
解析
考查动词辨析。本句意为“可能有很多机制共同作用,从而______我们选择基因相似的朋友…”。根据上下文可知,此处所填入动词需符合结构______sb.in doing sth.,纵观四个选项,只有D.drive“驱使”符合此用法,表示:这些机制驱使我们选择基因相似的朋友。A项limit用于limit sb.to doing sth.结构,observe“观察,遵守”和confuse“困惑”均无此用法,故排除。
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0
考研英语一
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