| 1. | Obelia | Metagenesis |
| 2. | Planaria | Free living with high regeneration capacity |
| 3. | Ancylostoma | Acoelomate |
| 4. | Nereis | Parapodia |
| I: | Sponges are mostly asymmetrical. |
| II: | Coelenterates, ctenophores and adult echinoderms have radial symmetry. |
| III: | Annelids and arthropods exhibit bilateral symmetry. |
| 1. | Only I and II |
| 2. | Only I and III |
| 3. | Only II and III |
| 4. | I, II and III |
| I: | the body is externally and internally divided into segments |
| II: | there is a serial repetition of at least some organs |
| Column I | Column II | ||
| A. | Asterias | i. | Earthworm |
| B. | Pila | ii. | Starfish |
| C. | Periplaneta | iii. | Snail |
| D. | Pheretima | iv. | Cockroach |
| Column-I | Column-II | ||
| A. | Organ level | (i) | Pheretima |
| B. | Cellular aggregate | (ii) | Fasciola |
| C. | Tissue level | (iii) | Spongilla |
| D. | Organ system level | (iv) | Obelia |