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Question #46247
The Question
The Cyathium inflorescence of Euphorbia represents an evolutionary strategy where multiple reduced flowers aggregate to mimic a single large flower (pseudanthium). Regarding the ecological fitness and reproductive constraints of such inflorescences, which of the following statements is INCORRECT?
Options
- A.
It optimizes pollinator attraction by maximizing the visual signal-to-reward ratio compared to producing multiple large solitary flowers.
- B.
The involucre bracts functionally replace the corolla, reducing the total energy expenditure required for individual perianth development.
- C.
In environments with severe pollinator limitation, these plants strictly maintain xenogamy to prevent inbreeding depression and ensure survival.
- D.
A shift towards geitonogamy or autogamy may be favored if the metabolic cost of maintaining the pseudanthium outweighs the outcrossing reproductive gain.
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
Darwinian Fitness|Inflorescence|Pollination
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: The 'Reproductive Assurance vs.
Genetic Diversity' trade-off.
Students often harbor the misconception that highly specialized, pollinator-attracting inflorescences are obligate outcrossers that will always avoid inbreeding.
However, Darwinian fitness prioritizes passing on genes (seed set) over maintaining genetic diversity; thus, severe pollinator limitation forces an evolutionary or phenotypic shift toward self-pollination.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Morphology of Flowering Plants - Class 11 |
| Concept | Inflorescence Types |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |