Evolution of bilaterian nerve cords, conceptual illustration. Bilaterians are animals with bilateral symmetry, which means they have a head, a tail, and an upper and lower side, as well as left and right sides. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Ella Maru Studio |
Taille de l’image : | 7241 px × 4827 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |