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?

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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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