| I: | Heart is dorsal |
| II: | Central nervous system is ventral |
| III: | A post-anal tail is present |
| Column-I | Column-II | ||
| A. | Cephalochordata | P. | Swim bladder |
| B. | Cyclostomata | Q. | Notochord – head to tail |
| C. | Chondrichthyes | R. | Males bear claspers on pelvic fins |
| D. | Osteichthyes | S. | Marine but migrate to freshwater for spawning |
| A | B | C | D | |
| 1. | S | Q | P | R |
| 2. | P | Q | R | S |
| 3. | Q | S | R | P |
| 4. | R | P | S | Q |
| 1. | Penguin: Aptenodytes | 2. | Tortoise: Testudo |
| 3. | Platypus: Macropus | 4. | Angel fish: Pterophyllum |
| Assertion (A): | Hemichordates are not chordates. |
| Reason (R): | They do not have a notochord. |
| 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. |
| 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. | Notochord is derived from embryonic mesoderm |
| 2. | Stomochord in hemochordates is actually notochord |
| 3. | Chordates have a post-anal tail |
| 4. | Pharynx is perforated by gill slits in chordates |
What is the number of animals, amongst the animals given below, that have both a four-chambered heart and endothermy?
Crocodilus, Aptendytes, Canis, Calotes, Struthio, Delphinus, Testudo, Ichthyophis
| 1. | 3 | 2. | 4 |
| 3. | 5 | 4. | 6 |
| COLUMN I | COLUMN II | ||
| A. | Petromyzon | P | A jawless vertebrate |
| B. | Icthyophis | Q | A limbless amphibian |
| C. | Struthio | R | A flightless bird |
| A | B | C | |
| 1. | Q | R | P |
| 2. | Q | P | R |
| 3. | P | Q | R |
| 4. | P | R | Q |
| 1. | Obelia | Metagenesis |
| 2. | Planaria | Free living with high regeneration capacity |
| 3. | Ancylostoma | Acoelomate |
| 4. | Nereis | Parapodia |