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Sexual selection, a mechanism of evolution that can drive the appearance of bright feathers and elaborate horns, is often assu
Sexual selection, a mechanism of evolution that can drive the appearance of bright feathers and elaborate horns, is often assu
admin
2022-02-15
20
问题
Sexual selection, a mechanism of evolution that can drive the appearance of bright feathers and elaborate horns, is often assumed to operate largely among males.【B1】________a fresh look at the data suggests it is more widespread among females than many researchers【B2】________
It was Charles Darwin who【B3】________suggested that males often compete【B4】________other males for females to mate with-which he argued could help explain why, for instance, some male birds have【B5】________bright plumage【B6】________this makes them a more obvious【B7】________for predators.
More recently, biologists have begun to realize that sexual selection【B8】________widely among females too, although Tim Janicke at the Centre for Functional and Evolutionary Ecology in France and his colleagues say it is still assumed to be a【B9】________peculiarity.
Now, Janicke and his colleagues have【B10】________evidence of female-orientated sexual selection in 72 species across the animal kingdom from scientific literature【B11】________between 2015 and 2020. They say the analysis suggests that【B12】________for mates in females should be considered the【B13】________
" We believe that our view of how we see sex differences in【B14】________, and also sexual selection in particular, is still very【B15】________towards males," says Janicke.
The analysis shows evidence of female sexual selection in a broad【B16】________of animals.【B17】________, in various species of pike, it is the female that is more colorful, with more【B18】________to attract mates. And in some tropical wading birds, such as jacanas, females fight each other【B19】________the attention of the highest quality male. The researchers invite investigators to spend more time studying such behavior in females.
" Sexual selection is a process that may【B20】________any sex," says Ingrid
at Uppsala University in Sweden.
【B1】
选项
A、But
B、Therefore
C、Nevertheless
D、However
答案
[A]
解析
本题考查连词辨析。四个选项分别为[A]But“但是,然而(口语常用词,语气较强,泛指与前述情况相反)”;[B]Therefore“因此”;[C]Nevertheless“然而,不过,尽管如此(指尽管做出完全让步,也不会发生任何影响)”;[D]However“但是,然而”。根据上文Sexual selection,…,is often assumed to operate largely among males.“人们通常认为性别选择主要在雄性中产生”和空格所在句…a fresh look at the data suggests it is more widespread among females…“一项新的数据研究表明,这种情况在雌性中更为普遍……”可知,此处与前述情况完全相反,故正确答案在选项[A]和选项[D]中,但However作为“然而”位于句首时,其后必须接逗号,故排除选项[D]。故选项[A]正确。
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0
考研英语一
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