- 1(current)
Q. No.Chondrichthyes:
| 1. | are marine animals and have cartilaginous endoskeleton |
| 2. | have a mouth located dorsally |
| 3. | have teeth that are modified cycloid or ctenoid scales directed backwardly |
| 4. | have the capacity to regulate their body temperature |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
76%
Level 2: 60%+
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What would not be true regarding cartilaginous fishes?
| 1. | In males, pelvic fins bear claspers |
| 2. | Some of them have electric organs [Torpedo] |
| 3. | None of them is viviparous |
| 4. | Some possess poison sting [Trygon] |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
81%
Level 1: 80%+
Hints
In chondrichthyes:
| 1. | Mouth is ventral, teeth are modified ctenoid scales and directed forwards. |
| 2. | Mouth is ventral, teeth are modified placoid scales and directed backwards. |
| 3. | Mouth is dorsal, teeth are modified ctenoid scales and directed forwards. |
| 4. | Mouth is dorsal, teeth are modified placoid scales and directed backwards. |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
84%
Level 1: 80%+
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Consider the given two statements:
| Assertion (A): | Cartilaginous fishes have to swim continuously to avoid sinking |
| Reason (R): | Cartilaginous fishes lack a swim bladder |
| 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. | (A) is False but (R) is False. |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
86%
Level 1: 80%+
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How many of the given pairs are correctly matched?
1. 1
2. 2
3. 3
4. 4
| I. | Scoliodon | - Dog fish |
| II. | Pristis | - Saw Fish |
| III. | Trygon | - Sting ray |
| IV. | Carcharodon | - Blue whale |
1. 1
2. 2
3. 3
4. 4
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
76%
Level 2: 60%+
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Consider the two statements:
| Statement I: | Cartilaginous fishes have internal fertilization |
| Statement II: | Many cartilaginous fishes have viviparity |
| 1. | Statement I is correct and Statement II is incorrect |
| 2. | Statement I is incorrect and Statement II is correct |
| 3. | Both Statement I and Statement II are correct |
| 4. | Both Statement I and Statement II are incorrect |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
89%
Level 1: 80%+
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How many pairs are correctly matched?
I: Exocoetus-Flying fish
II: Betta-Fighting fish
III: Pterophyllum : Angel fish
1. 0
2. 1
2. 2
4. 3
I: Exocoetus-Flying fish
II: Betta-Fighting fish
III: Pterophyllum : Angel fish
1. 0
2. 1
2. 2
4. 3
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
83%
Level 1: 80%+
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- 1(current)
Q. No.
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