- 1(current)
Q. No.| Assertion (A): | All vertebrates are chordates but all the chordates are not vertebrates. |
| Reason (R): | All the vertebrates are characterised by the presence of a notochord, a dorsal hollow nerve cord and paired pharyngeal gill slits at some stages of the life cycle. |
| 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. |
Subtopic: Â General Introduction: Vertebrates & Agnatha |
 52%
Level 3: 35%-60%
Hints
Choose the correct match:
| 1. | Branchostoma : Notochord persist through out the life |
| 2. | Ascidia : Notochord present in larva and disappears in adult |
| 3. | Doliolum : Notochord present in the larval tail only |
| 4. | More than one option is correct |
Subtopic: Â Phylum Hemichordata |Â General Introduction: Vertebrates & Agnatha |Â Class Cyclostomata |
 82%
Level 1: 80%+
Hints
Lampreys:
| 1. | May or may not possess jaw |
| 2. | Is included in the division Agnatha where notochord is present only in the early stages |
| 3. | Possess an elongated body with gill slits for respiration |
| 4. | Are devoid of scales and possess paired fins |
Subtopic: Â General Introduction: Vertebrates & Agnatha |Â Class Cyclostomata |
 50%
Level 3: 35%-60%
Hints
- 1(current)
Q. No.
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