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Question #46267
The Question
The fleshy, nutrient-storing taproot of Daucus carota (carrot) and the succulent, edible mesocarp of Mangifera indica (mango) both serve as massive nutrient reservoirs. From an evolutionary and ontogenetic perspective, which of the following statements correctly evaluates these two structures?
Options
- A.
They are homologous structures demonstrating divergent evolution, as both originate from the embryonic axis but perform different ecological roles.
- B.
They represent analogous structures resulting from convergent evolution, having distinct developmental origins but adapting to similar selective pressures for storage.
- C.
They are examples of adaptive radiation, where a common ancestral vegetative organ modified into distinct reproductive and somatic structures.
- D.
They exhibit convergent evolution but are considered homologous because both are composed primarily of homologous parenchymatous ground tissue.
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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
Fruit Structure DNA|Analogous Organ Structure|Root Modifications
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Distinguishing between vegetative (root) and reproductive (ovary/fruit) ontogeny.
Students often fall for the trap that because both structures are fleshy, store starch/sugars, and consist of parenchyma, they might share a homologous developmental pathway.
The question forces the application of evolutionary definitions (convergent evolution) to morphological facts from NCERT (root modifications vs. fruit anatomy).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Morphology of Flowering Plants - Class 11 |
| Concept | Fruit Structure DNA |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |