You are presented with the question "Which species doesn't have an anterior or posterior end?" and the following answer choices: 
- animals
 - peachleaf willow
 - Rabbits
 - Blowfish
 - fur seals
 - Snakes
 - Echinoderms
 - alpacas

Now knowing that adult echinoderms have radial symmetry and animals with radial symmetry lack an anterior and posterior end, choose the best answer.


 

       Echinoderms  