| 1. | Locomotion |
| 2. | Gas exchange (respiration) |
| 3. | Feeding |
| 4. | Reproduction |
| Assertion (A): | Roundworms (phylum Nematoda) are pseudocoelomates. |
| Reason (R): | Pseudocoelom provides protection for internal organs and facilitates movement of nutrients. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Consider the given two statements:
| Assertion (A): | Roundworms are considered pseudocoelomates. |
| Reason (R): | They have a body cavity not lined with mesoderm. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
| Assertion (A): | Echinoderms have a water vascular system. |
| Reason (R): | The water vascular system is used for locomotion, capturing food, and respiration. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
| I. | Cartilaginous fishes have cycloid or ctenoid scales. |
| II. | An air bladder is present in bony fishes. |
| III. | Amphibians have three-chambered heart. |
| IV. | Reptiles have dermal scales. |
| V. | Birds are warm-blooded. |
| Statement I: | The only vertebrates with jointed appendages are the insects. |
| Statement II: | The only invertebrates capable of flight are the insects. |
| I: | All living members are ectoparasites on some fishes. |
| II: | They have an elongated body bearing 6-15 pairs of gill slits for respiration. |
| III: | They have a sucking and circular mouth without jaws. |
| IV: | Their body has scales and paired fins. |
| V: | Circulation is of open type. |
| VI: | Cyclostomes are fresh water animals but migrate for spawning to marine water. |
| Statement I: | All animals with bilateral symmetry are triploblastic. |
| Statement II: | All animals with bilateral symmetry may not have a coelom. |
| 1. | Statement I is correct but Statement II is incorrect. |
| 2. | Statement I is incorrect but Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect |
| a. | All multicellular animals exhibit the same pattern of organisation of cells. |
| b. | Organ level of organisation is exhibited by members of Platyhelminthes and other higher phyla where tissues are grouped together to form organs. |
| c. | Organ systems in different groups of animals exhibit various patterns of complexities. |
| d. | In all multicellular animals which have organ level of body organisation, a complete digestive system has two opening, mouth and anus. |