Statement I: | All members of Animalia are multicellular. |
Statement II: | All members of Animalia have at least a tissue grade of organisation. |
1. | Arthropods | 2. | Hemichordates |
3. | Most molluscs | 4. | Annelids |
Statement I: | An undifferentiated layer, mesoglea, is present in between the ectoderm and the mesoderm in diploblastic organisms. |
Statement II: | A third germinal layer, endoderm, in between the ectoderm and mesoderm, is present in triploblastic animals. |
I: | Sponges are mostly asymmetrical. |
II: | Coelenterates, ctenophores and adult echinoderms have radial symmetry. |
III: | Annelids and arthropods exhibit bilateral symmetry. |