- 1(current)
Q. No.The number of correct statements from the given statements, regarding the members of Class Cyclostomata, is:
| (a) | All living members are ectoparasites on some fishes. |
| (b) | The body bears 6-15 pairs of gill slits for respiration. |
| (c) | They have a sucking and circular mouth without jaws. |
| (d) | Their body is devoid of scales and paired fins. |
| (e) | Cranium and vertebral column are bony. |
| (f) | Circulation is of open type. |
| 1. | 3 | 2. | 4 |
| 3. | 5 | 4. | 6 |
Subtopic: Â General Introduction: Vertebrates & Agnatha |Â Class Cyclostomata |
 62%
Level 2: 60%+
Hints
Regarding reproduction in Cyclostomes:
| I: | They are marine but migrate for spawning to fresh water. |
| II: | After spawning, within a few days, they die. |
| III: | Their larvae, after metamorphosis, return to the ocean. |
| 1. | Only II is correct |
| 2. | Only I and II are correct |
| 3. | Only II and III are correct |
| 4. | I, II and III are correct |
Subtopic: Â General Introduction: Vertebrates & Agnatha |Â Class Cyclostomata |
 89%
Level 1: 80%+
Hints
Identify the pair of animals that are members of Class Cyclostomata:
| 1. | Petromyzon, Myxine |
| 2. | Ascidia, Salpa |
| 3. | Pristis, Doliolum |
| 4. | Branchiostoma, Balanoglossus |
Subtopic: Â General Introduction: Vertebrates & Agnatha |Â Class Cyclostomata |
 93%
Level 1: 80%+
Hints
- 1(current)
Q. No.
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