The diagram below shows the body plan of a:
A typical reptilian heart is shown by the figure:
| 1. | 2. | ||
| 3. | 4. |
The larvae in echinoderms are:
| I: | Radially symmetrical | II: | Free swimming |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
| I: | They have a cellular level of organisation |
| II: | Digestion is intracellular |
| III: | Fertilization is external and development is direct |
| 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. |
| 1. | Cyclostomata | 2. | Chondrichthyes |
| 3. | Amphibia | 4. | Reptilia |