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Question #46100
The Question
Ecologists analyzing the species-area relationship () of endemic flora in a continuous Amazonian tract versus a severely fragmented anthropogenic landscape observed a significant shift in the regression coefficient (Z-value). Which of the following statements regarding this phenomenon is INCORRECT?
Options
- A.
The Z-value in the fragmented landscape steepens towards 0.6 to 1.2, reflecting a rapid, non-linear collapse of niche-restricted specialized species.
- B.
On a logarithmic scale, the species-area relationship for both landscapes manifests as a rectangular hyperbola, whereas it is a straight line on an arithmetic scale.
- C.
In the continuous, undisturbed tract, the Z-value is expected to remain relatively constant (0.1 to 0.2) regardless of the taxonomic group analyzed.
- D.
The steeper Z-value in the fragmented habitat indicates that area loss exponentially accelerates the transition of species into the 'Critically Endangered' IUCN category.
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
Z-value|Large_Area_Sampling|Biodiversity_Hotspots
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: The trap relies on the graphical representation of the species-area relationship across different mathematical scales.
Students often rote-memorize 'rectangular hyperbola' without linking it strictly to the arithmetic scale.
The question also tests the advanced application of the Z-value: understanding that a steeper slope (0.6-1.2) isn't just a number for 'large continents' (as per basic NCERT), but ecologically represents a severe, non-linear vulnerability to extinction in fragmented habitats.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biodiversity and Conservation - Class 12 |
| Concept | World Summit on Sustainable Development |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |