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Question #46250
The Question
During the organogenesis of a bisexual flower, the floral meristem undergoes precise differentiation to establish symmetry and sexuality. If an abnormal Auxin-to-Cytokinin ratio triggers dedifferentiation in the primordia of the fourth floral whorl, causing it to subsequently develop into stamen-like structures, which of the following is the most accurate physiological consequence?
Options
- A.
The flower becomes functionally staminate, preventing autogamy, as the dedifferentiated primordia undergo redifferentiation into microsporophylls.
- B.
The floral axis loses its determinate growth and reverts to a vegetative shoot apical meristem, permanently altering the flower's symmetry.
- C.
The absence of the ovary triggers compensatory parthenocarpy, allowing the thalamus to develop into a seedless false fruit.
- D.
The cells of the fourth whorl exhibit environmental plasticity, maturing into stamens without the need to undergo redifferentiation.
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Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Regulatory_Failure
Understand how NOT, EXCEPT, and logical constraints are used to manipulate exam results.
Concepts Behind This Question
Differentiation vs Dedifferentiation|Flower Symmetry|Flower Sexuality
Why This Question Is Tricky
Common Mistakes
The Conceptual Pivot lies in distinguishing between the sequential phases of cellular development (differentiation -> dedifferentiation -> redifferentiation) and understanding their morphological consequences.
A common misconception is failing to recognize that forming a new specialized structure after losing the original identity constitutes 'redifferentiation'.
Additionally, students often fall for the 'parthenocarpy' trap, forgetting that an ovary is an absolute anatomical prerequisite for fruit formation, even if seedless.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Morphology of Flowering Plants - Class 11 |
| Concept | Flower Symmetry and Sexuality |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |