PASSAGE THREE Why do vertebrates reject transplanted tissues according to Paragraph 3?

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问题 PASSAGE THREE
Why do vertebrates reject transplanted tissues according to Paragraph 3?

选项

答案Because they are genetically incompatible．

解析细节推理题。根据文章提到的…are accepted only if they come from genetically compatible or closely related individuals推导可知排异来自基因的不兼容性。

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专业英语四级

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