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.
答案:登入後查看
統計: A(16), B(35), C(71), D(7), E(10) #938829
統計: A(16), B(35), C(71), D(7), E(10) #938829