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Question #47531
The Question
In a marine ecosystem, the pyramid of biomass is typically inverted, despite the pyramid of energy being strictly upright. Which of the following structural and functional attributes of phytoplankton primarily sustains this inverted biomass pyramid without violating the laws of thermodynamics?
Options
- A.
Simple thallus organization with a high surface area-to-volume ratio, facilitating rapid nutrient uptake and an exceptionally high turnover rate.
- B.
Complex thallus differentiation that maximizes photosynthetic efficiency, allowing a high standing crop to support larger consumers.
- C.
Lower metabolic rate and longer lifespan compared to zooplankton, ensuring continuous energy transfer despite a smaller biomass.
- D.
Ability to maintain an inverted pyramid of energy by producing more biomass per unit area than the primary consumers.
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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
Angiosperm Double Fertilization|Polyembryony Mechanisms|Equational Division Logic
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Distinguishing between 'Standing Crop' (Biomass at a specific time) and 'Productivity' (Rate of biomass generation).
The trap relies on students failing to link the microscopic anatomy (high SA:V ratio) of algae to their ecological population dynamics (rapid turnover rate), or falling for the misconception that an inverted biomass pyramid implies an inverted energy pyramid.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Plant Kingdom - Class 11 |
| Concept | Angiosperm Double Fertilization |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |