27. Which of the following phylogenetic history is considered correct?
(A) Jawed animals appeared earlier than vertebrates.
(B) Vertebrate appeared earlier than notochord.
(C) Mineralized skeleton appeared earlier than lungs or lung derivatives.
(D) Amniotic egg appeared earlier than jawed animals.
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1. 題目解析 這道題目考察的是生物的系...
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