問題詳情

47. The first vertebrates are most closely related phylogenetically to which of the following phyla?
(A) Echinodermata.
(B) Annelida.
(C) Mollusca.
(D) Arthropoda.
(E) None of these.

參考答案

答案：A
難度：困難0.375
統計：A(3),B(1),C(1),D(1),E(0)