34. The most ancient branch point in animal phylogeny is that between having
(A)a body cavity or no body cavity.
(B)radial or bilateral symmetry.
(C)true tissues or no tissues.
(D) diploblastic or triploblastic embryos.
(E)a well-defined head or no head.
詳解 (共 3 筆)
未解鎖
這是一道關於動物演化學(Animal P...
未解鎖
分類順序:有 True tissue →...