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GRE阅读练习：蝴蝶产卵

2020-07-08 08:16:19来源：网络

　　为了帮助大家高效备考GRE，新东方在线GRE频道为大家带来GRE阅读练习：蝴蝶产卵，希望对大家GRE备考有所帮助。更多精彩尽请关注新东方在线GRE频道!

　　蝴蝶产卵(逻辑)

　　Upon maturity,monarch butterflies travel hundreds of miles from their places of origin and lay their eggs on milkweed. The caterpillars that emerge feed on milkweed and absorb the glycosides in milkweed sap. The specific glycosides present in milkweed differ from region to region within the monarch butterfly’s range. Mature butterflies retain the glycosides in a mature monarch butterfly could be used to determine its place of origin.

　　Which of the following, if true, most strengthens the argument?

　　A. Mature monarch butterflies do not feed on parts of milkweed that contain glycosides.

　　B. The glycosides in milkweed sap are slightly toxic to caterpillars of other species.

　　C. The vast majority of the monarch butterflies that are laying eggs in a given region will have traveled there from a single region.

　　D. There are substances other than glycosides in milkweed sap that accumulate in a monarch caterpillar and are retained in the body of the mature butterfly.

　　E. There are certain glycosides that are found in the sap of all milkweeds, no matter where they grow within the monarch butterfly’s range.

　　以上就是关于“GRE阅读练习：蝴蝶产卵”的内容，更多精彩内容，请关注GRE频道!


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