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Question #47460
The Question
The corpus callosum is a prominent tract of nerve fibres connecting the cerebral hemispheres. While often generalized as a mammalian trait, a true corpus callosum is an exclusive evolutionary hallmark of eutherians. Which of the following organisms lacks a true corpus callosum, relying instead on structures like the anterior commissure for inter-hemispheric integration (a functionally analogous adaptation)?
Options
- A.
Macropus
- B.
Delphinus
- C.
Pteropus
- D.
Equus
Check Your Answer
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
Corpus Callosum Functionality|Vertebrate_Brain_Evolution
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often overgeneralize the NCERT line 'the cerebrum is connected by the corpus callosum' to all vertebrates or all mammals.
This question traps students who fail to integrate Neural Coordination with the taxonomic distinctions of Class Mammalia (Prototheria, Metatheria, Eutheria) and the evolutionary concept of analogous structures.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Neural Control and Coordination - Class 11 |
| Concept | Corpus Callosum Functionality |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |