Which species doesn't have an anterior or posterior end?\nOptions:\n- (A) animals\n- (B) peachleaf willow\n- (C) Rabbits\n- (D) Blowfish\n- (E) fur seals\n- (F) Snakes\n- (G) Echinoderms\n- (H) alpacas Let's be accurate as possible.
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Adult echinoderms have radial symmetry. Animals with radial symmetry lack an anterior and posterior end. Adult echinoderms lack an anterior and posterior end.
The final answer: (G).
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