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Question #46449
The Question
An ancestral lineage of parasitic nematodes diversifies into multiple distinct species, each exhibiting strict host-specificity towards a different species of sympatric herbivorous mammals. Based on the principles of evolutionary ecology and population interactions, which of the following statements regarding this phenomenon is INCORRECT?
Options
- A.
This diversification represents adaptive radiation, where different host species function as distinct biological niches.
- B.
Strict host-specificity acts as a reproductive isolating mechanism, functionally analogous to geographical barriers.
- C.
The co-evolutionary 'arms race' restricts the parasite's niche breadth, thereby preventing adaptive radiation and causing evolutionary stagnation.
- D.
The continuous evolution of counter-mechanisms by the parasite against host resistance is essential to maintain this host-specificity.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Regulatory_Failure
Understand how NOT, EXCEPT, and logical constraints are used to manipulate exam results.
Concepts Behind This Question
Adaptive Radiation Logic|Evolutionary Ecology of Parasitism|Biotic Interactions - Positive/Negative sign matrix
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often confuse 'niche breadth' with 'evolutionary radiation'.
A common misconception is that extreme specialization (narrow niche/host-specificity) limits evolutionary potential.
In reality, host-specificity acts as an isolating mechanism that accelerates speciation and adaptive radiation across different host 'islands'.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Evolution - Class 12 |
| Concept | Adaptive Radiation Logic |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |