27. Unlike eutherian (placental) mammals, both monotremes and marsupials
(A) have some embryonic development outside the mother's uterus.
(B) are found in Australia and Africa.
(C) lay eggs.
(D) lack nipples.
(E) include only insectivores and herbivores.
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統計: 尚無統計資料
統計: 尚無統計資料