- 1(current)
Q. No.Identify the incorrect statement regarding bony fishes:
| I: | They have four pairs of gills which are covered by an operculum on each side. |
| II: | Due to the absence of air bladder, they have to swim constantly to avoid sinking. |
| III: | Skin is covered with placoid scales. |
| IV: | Mouth is mostly terminal. |
| 1. | Only II | 2. | Only II and III |
| 3. | Only I and IV | 4. | Only IV |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Osteichthyes |
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Which of the following is not a bony fish?
| 1. Angel fish | 2. Flying fish |
| 3. Star fish | 4. Fighting fish |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Osteichthyes |
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Exocoetus, Labeo, Clarias and Pterophyllum are all:
| 1. endotherms | 2. marine fishes |
| 3. protochordates | 4. bony fishes |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Osteichthyes |
85%
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The structure marked as ‘S’ in the given diagram helps bony fishes in:
| 1. | Oxygenation of blood |
| 2. | Achieving neutral buoyancy |
| 3. | Increasing absorptive surface area for food |
| 4. | Protection of the nerve cord |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Osteichthyes |
73%
Level 2: 60%+
- 1(current)
Q. No.
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