試題詳解

12. In animal physiology, when differentiating between roundworms, annelids, and snakes, which characteristics could you use?
(A) Radial symmetry and dorsal nerve cord.
(B) Radial symmetry and worm-like body shape.
(C) Segmentation and dorsal nerve tube.
(D) Segmentation and bilateral symmetry.
(E) Pseudocoelom and ventral nerve cord.