 |
| Previous Image | Next Image |
| Description: Animals can be categorized based on (a) the absence of different tissue types (Parazoa; the sponges) or (b,c) the presence of tissues (Eumetazoa; all other animals). Further categorization is based on the presence of (b) radial symmetry (Radiata; the cnidarians and ctenophores) or (c) bilateral symmetry (Bilateria; all other animals).
Picture Stats: Views: 1342 Filesize: 49.08kB Height: 232 Width: 850 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=871 |