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Question #46283
The Question
In a plant belonging to the family Liliaceae, a targeted chemical mutagen specifically disrupts the formation of the spindle apparatus during the division of the generative cell. Assuming successful transfer of this pollen to a compatible stigma, which of the following statements correctly predicts the post-pollination events and the functional status of its characteristic androecium cohesion?
Options
- A.
The pollen tube will grow through the style, but both syngamy and triple fusion will fail; the evolutionary advantage of its epiphyllous stamens is nullified.
- B.
Pollen germination will not occur due to the lack of a functional vegetative cell; the epipetalous stamens will fail to facilitate pollination.
- C.
Only single fertilization will occur as only one male gamete is produced; the epiphyllous stamens will still contribute to partial reproductive fitness.
- D.
Microsporogenesis will be arrested at the tetrad stage, leading to complete male sterility; the cohesion of stamens with petals becomes functionally redundant.
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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
Liliaceae|Generative Cell Division|Androecium Cohesion/Adhesion
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: This question tests the functional independence of the vegetative and generative cells during microgametogenesis, combined with family-specific floral morphology.
A common misconception is that any mutation affecting pollen will halt pollen tube germination.
Students must recognize that the vegetative cell controls tube growth, while the generative cell solely provides the gametes.
Furthermore, it acts as a 'Location/Taxonomy Trap' by testing the distinction between epiphyllous (Liliaceae) and epipetalous conditions.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Morphology of Flowering Plants - Class 11 |
| Concept | Liliaceae Floral Formula |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |