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Question #46663
The Question
In a marine ecosystem, the biomass pyramid is typically inverted, with the standing crop of zooplankton exceeding that of phytoplankton. Which of the following statements regarding the ecological dynamics of this ecosystem is INCORRECT?
Options
- A.
The energy pyramid for this ecosystem remains strictly upright because energy flow is unidirectional and subject to the 10% law.
- B.
The total energy assimilated by the zooplankton population over a given period exceeds the total energy assimilated by the phytoplankton population.
- C.
The phytoplankton population exhibits a significantly higher turnover rate and shorter lifespan compared to the zooplankton.
- D.
The standing crop measured at any specific moment fails to reflect the actual gross primary productivity of the phytoplankton.
Check Your Answer
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
Key-stone Species|Niche_Complementarity|Productivity
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often conflate 'Biomass' (standing crop) with 'Energy Assimilation' (productivity).
The common misconception is assuming that an inverted biomass pyramid implies an inverted energy flow, or that a larger consumer biomass inherently assimilated more total energy than the producer level below it.
The trap relies on failing to distinguish between a static snapshot (biomass) and a dynamic rate (energy flow/turnover).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Ecosystem - Class 12 |
| Concept | Productivity Ratios |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |