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Question #46651
The Question
In a typical marine ecosystem, the pyramid of biomass is inverted. Which of the following statements regarding the trophic dynamics of this ecosystem is INCORRECT?
Options
- A.
The standing crop of phytoplankton is lower than that of zooplankton at any given point in time.
- B.
The rapid turnover rate of phytoplankton ensures a continuous energy flow that supports the larger biomass of higher trophic levels.
- C.
The inverted biomass pyramid implies that the Net Primary Productivity (NPP) of the ecosystem is lower than its secondary productivity.
- D.
The pyramid of energy for this ecosystem remains strictly upright, as energy is invariably lost as heat at each successive trophic level.
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
Ecotone and Edge Effect|Hydrarch vs Xerarch Convergence|Ecological Succession Climax
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: The critical distinction between 'Standing Crop' (a static snapshot of biomass) and 'Productivity' (a dynamic rate of energy flow).
Students commonly fall into the trap of assuming that an inverted biomass pyramid (lower producer biomass) equates to lower producer productivity.
They fail to account for the 'Turnover Rate' which allows a small standing crop of phytoplankton to generate massive NPP, keeping the energy pyramid strictly upright.
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 |