問題詳情
30. In which vertebrates is fertilization exclusively internal?
(A) chondrichthyans, osteichthyans, and mammals
(B) amphibians, mammals, and reptiles
(C) chondrichthyans, osteichthyans, and reptiles
(D) reptiles and mammals
(E) reptiles and amphibians
(A) chondrichthyans, osteichthyans, and mammals
(B) amphibians, mammals, and reptiles
(C) chondrichthyans, osteichthyans, and reptiles
(D) reptiles and mammals
(E) reptiles and amphibians
參考答案
答案：D
難度：適中0.611111
統計：A(0),B(1),C(3),D(11),E(1)
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