| I: | Exclusively marine animals. |
| II: | Many members exhibit bioluminescence. |
| III: | Animals are diploblastic |
| IV: | Only sexual reproduction seen. |
| Column-I | Column-II | ||
| A. | Comb plates | P. | Cnidaria |
| B. | Metagenesis | Q. | Mollusca |
| C. | Canal system | R. | Sponges |
| D. | Radula | S. | Ctenophora |
| A | B | C | D | |
| 1. | S | P | R | Q |
| 2. | P | S | R | Q |
| 3. | P | S | Q | R |
| 4. | S | P | Q | R |
| 1. | In cockroaches and prawns, excretion of waste material occurs through malpighian tubules. |
| 2. | In ctenophores, locomotion is mediated by comb plates. |
| 3. | In Fasciola, flame cells help in excretion |
| 4. | Earthworms are hermaphrodites and yet, cross-fertilization takes place among them. |
| A | B | C | |
| 1 | Pseudocoelomate | Acoelmate | Eucoelomate |
| 2 | Acoelmate | Pseudocoelomate | Acoelmate |
| 3 | Acoelmate | Pseudocoelomate | Eucoelomate |
| 4 | Acoelomate | Pseudocoelomate | Pseudocoelomate |
| 1. | Cnidaria and Ctenophora |
| 2. | Porifera and Cnidaria |
| 3. | Aschelminthes and Porifera |
| 4. | Echinodermata and Chordata |
| 1. | A cnidoblast is seen in Cnidaria |
| 2. | Bioluminescence is well developed in some Ctenophores |
| 3. | Protonephridia are excretory and osmoregulatory structures in flatworms |
| 4. | Nematodes have a true coelom |