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Question #46853
The Question
Read the following statements correlating connective tissue matrix composition with structural adaptations in aquatic vertebrates. Which statement is INCORRECT?
Options
- A.
The endoskeleton of Osteichthyes features a hard, non-pliable matrix rich in calcium salts and collagen fibers, utilizing an air bladder to regulate the buoyancy of this dense framework.
- B.
The intercellular material of the Chondrichthyes endoskeleton is solid and pliable due to the presence of chondroitin salts, which resist compression.
- C.
In Chondrichthyes, the absence of an air bladder dictates that they must swim constantly to avoid sinking, despite possessing a lighter cartilaginous endoskeleton compared to bony fishes.
- D.
To compensate for the absence of an air bladder, Chondrichthyes deposit dense hydroxyapatite crystals within their connective tissue matrix to generate hydrodynamic lift.
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Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Cartilage|Bone|Type_II_Collagen|Mineralization
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Linking micro-anatomy (connective tissue matrix) to macro-physiology (buoyancy).
The trap relies on 'Terminology Overload' and 'Functional Confusion'—using complex terms like 'hydroxyapatite' and 'hydrodynamic lift' to mask the fundamental NCERT fact that Chondrichthyes have a cartilaginous (chondroitin-based), not bony (hydroxyapatite-based), skeleton.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Structural Organisation in Animals - Class 11 |
| Concept | Connective Tissue Fiber Composition |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |