| A. | Endoskeleton was made of cartilage. |
| B. | Ectoparasitic; as they were found attached on fish skin with their circular sucking mouth. |
| C. | Paired fins and scales were absent, but 7 pairs of gill slits were present. |
| 1. | Exocoetus sp |
| 2. | Branchiostoma sp |
| 3. | Petramyzon sp |
| 4. | Scoliodon sp |
| 1. | Struthio |
| 2. | Psittacula |
| 3. | Neophron |
| 4. | Aptenodytes |
| 1. | Devil fish, Cuttlefish and Hagfish |
| 2. | Starfish, Hagfish and Cuttlefish |
| 3. | Flying fish, Angel fish and Fighting fish |
| 4. | Saw fish, Fighting fish and Dog fish |
| A. | Digestive system in Platyhelminthes is incomplete. |
| B. | Bilateral symmetry is a characteristic feature of adult Echinoderms. |
| C. | Pseudocoelom is possessed by Aschelminthes. |
| D. | Notochord is persistent throughout life in the class Chondrichthyes. |
| E. | Members of class Reptilia maintain a constant body temperature. |
| 1. | B and E only | 2. | C and D only |
| 3. | A and C only | 4. | B and D only |
| Statement I: | The class name Reptilia refers to creeping or crawling mode of locomotion. |
| Statement II: | All organisms belonging to Reptilia have three chambered heart. |
| 1. | Statement I is incorrect but Statement II is correct |
| 2. | Both Statement I and Statement II are correct |
| 3. | Both Statement I and Statement II are incorrect |
| 4. | Statement I is correct but Statement II is incorrect |
| 1. | Presence of post anal part (tail) |
| 2. | Presence of notochord |
| 3. | Central nervous system is dorsal |
| 4. | Absence of gills |
| Statement I: | When any plane passing thought the central axis of the body divide the organism into two identical halves, it is called radial symmetry. |
| Statement II: | In phylum Echinodermata, both adults and larvae are radially symmetrical. |
| 1. | Statement I is incorrect but Statement II is correct |
| 2. | Both Statement I and Statement II are correct |
| 3. | Both Statement I and Statement II are incorrect |
| 4. | Statement I is correct but Statement II is incorrect |
| Assertion (A): | All vertebrates are chordates but all chordates are not vertebrate. |
| Reason (R): | The members of subphylum vertebrata possess notochord during the embryonic period, the notochord is replaced by a cartilaginous or bony vertebral column in adults. |
| 1. | (A) is True but (R) is False. |
| 2. | (A) is False but (R) is True. |
| 3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 4. | Both (A) and (R) are True but (R) is not the correct explanation of (A) |
| 1. | Symbiotic | 2. | Ectoparasite |
| 3. | Free living | 4. | Endoparasite |
| A. | Respiration and locomotion |
| B. | Excretion and locomotion |
| C. | Capture and transport of food |
| D. | Digestion and respiration |
| E. | Digestion and excretion |