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Question #46650
The Question
Read the following statements regarding ecological succession, specifically focusing on the transition from a xerarch to a mesic environment. Which of the following statements is INCORRECT?
Options
- A.
Lichens act as pioneer species on bare rocks, facilitating the establishment of bryophytes by secreting acids that promote pedogenesis.
- B.
The progression towards a climax community is characterized by a continuous increase in structural stratification, total biomass, and niche specialization.
- C.
During seral transitions, existing communities modify the substrate to make it progressively more suitable for their own continued dominance and less suitable for subsequent invaders.
- D.
Extreme abiotic stressors can inhibit the establishment of canopy-layer specialists, effectively arresting the system at a sub-climax stage and preventing mesic stability.
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
Ecotone and Edge Effect|Alien Species Invasion Impacts
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often misunderstand the driving force of seral replacement.
They assume a species modifies the environment to secure its own dominance (competitive exclusion).
In reality, primary succession relies heavily on 'Facilitation', where pioneer and intermediate species inadvertently engineer their own obsolescence by creating soil and shade conditions that favor the invasion of the subsequent seral stage.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Organisms and Populations - Class 12 |
| Concept | Ecotone and Edge Effect |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |