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Question #46037
The Question
In a stable aquatic ecosystem, the climax community often exhibits an inverted pyramid of biomass. Which of the following statements regarding the ecological dynamics of this community is INCORRECT?
Options
- A.
The standing crop of phytoplankton at any given time is significantly lower than that of the zooplankton.
- B.
The Net Primary Productivity (NPP) of the phytoplankton is lower than the total energy assimilated by the zooplankton.
- C.
The stability of this ecosystem is maintained by the exceptionally high turnover rate and short lifespan of the phytoplankton.
- D.
The pyramid of energy for this climax community remains strictly upright, reflecting a unidirectional flow of energy.
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Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Evolutionary_Exception
Tackle problems where standard rules evolve or change based on specific environmental constraints.
Concepts Behind This Question
In-situ Conservation (Hotspots)|Alien Species Invasion Impacts|Endemism
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: The fundamental distinction between 'Standing Crop' (static mass at a given time) and 'Net Primary Productivity' (rate of energy capture over time).
Students often conflate the two, assuming an inverted biomass pyramid implies inverted productivity.
The trap exploits this by suggesting NPP must be lower to create an inverted biomass, ignoring the thermodynamic rule that energy flow must always be upright.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biodiversity and Conservation - Class 12 |
| Concept | Global Species Diversity Patterns |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |