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Question #46687
The Question
Consider the ecological pyramids of a typical marine ecosystem. Which of the following statements is INCORRECT regarding its trophic dynamics?
Options
- A.
The pyramid of biomass is inverted because the standing crop of primary consumers exceeds that of primary producers.
- B.
The inverted biomass pyramid indicates that the net primary productivity of phytoplankton is lower than the assimilation rate of zooplankton.
- C.
The pyramid of energy remains strictly upright, adhering to the 10 percent law of energy transfer.
- D.
Phytoplankton possess a high turnover rate, allowing a small standing crop to support a larger biomass of zooplankton.
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
Standing Crop quantification|Inverted Biomass Pyramids|Hydrarch vs Xerarch Convergence
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students frequently confuse 'Standing Crop' (an instantaneous measure of living mass) with 'Productivity' (the rate of biomass generation over time).
The trap relies on the misconception that an inverted biomass pyramid implies producers generate less total energy than consumers require, which would violate the First Law of Thermodynamics.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Ecosystem - Class 12 |
| Concept | Hydrarch vs Xerarch Convergence |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |