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Question #46202
The Question
Given below are two statements regarding thermoregulation and evolutionary adaptations in fishes:
Statement I: Certain large, fast-swimming fishes like Tuna (Osteichthyes) and Great White Sharks (Chondrichthyes) exhibit regional endothermy, utilizing a counter-current vascular network (rete mirabile) to retain metabolic heat in their lateral swimming muscles. Statement II: This thermal homeostasis is physically viable because their low surface area-to-volume ratio minimizes heat loss, and both groups utilize an air bladder to provide additional internal thermal insulation.
Choose the most appropriate answer from the options given below:
Options
- A.
Both Statement I and Statement II are correct.
- B.
Both Statement I and Statement II are incorrect.
- C.
Statement I is correct but Statement II is incorrect.
- D.
Statement I is incorrect but Statement II is correct.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Evolutionary_Exception
Tackle problems where standard rules evolve or change based on specific environmental constraints.
Concepts Behind This Question
Endothermy vs Ectothermy|Steady State Flux
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Integrating ecological scaling laws (Surface Area-to-Volume ratio) with taxonomic anatomy (presence/absence of an air bladder in Osteichthyes vs Chondrichthyes).
Common Misconception: Students often read the first half of a statement (which is ecologically correct regarding the SA:V ratio) and assume the entire statement is true, overlooking the fatal anatomical trap regarding the air bladder in cartilaginous fishes.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Animal Kingdom - Class 11 |
| Concept | Thermoregulation logic |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |