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Question #45761
The Question
Ecological succession involves changes in both species composition and the physical environment. During hydrarch succession, the community transitions from aquatic to mesic conditions. Which of the following statements regarding the physiological and ecological adaptations during this transition is INCORRECT?
Options
- A.
The progression towards a mesic climax community requires successive seral stages to possess increasingly robust terrestrial water retention mechanisms.
- B.
Submerged seral stages possess a thick waxy cuticle and well-developed stomatal regulation to prevent cellular lysis from continuous endosmosis in the hypotonic aquatic environment.
- C.
The local elimination of early seral stages occurs because their modification of the substrate outpaces their phenotypic plasticity to adapt to decreasing water levels.
- D.
Both hydrarch and xerarch successions ultimately converge towards a similar mesic climax community, despite starting from opposite extremes of water availability.
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
Pioneer_Species|Secondary_Succession|Climax_Community
Why This Question Is Tricky
Common Mistakes
The 'Conceptual Pivot' relies on the functional evolutionary purpose of the cuticle and stomata.
Students often confuse osmoregulation in hypotonic environments (preventing cellular bursting) with terrestrial water retention (preventing desiccation).
The trap exploits the false assumption that aquatic plants need a cuticle to 'waterproof' themselves against incoming water, whereas cuticles actually evolved to prevent water from escaping into dry air.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Excretory Products and Their Elimination - Class 11 |
| Concept | Osmoregulation in Aquatic Adaptations |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |