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Question #47557
The Question
During the transition from vegetative to reproductive growth in angiosperms, precise hormonal cross-talk is required at the shoot apex. If a researcher artificially maintains a very high Auxin to Cytokinin ratio at the apical meristem during an otherwise inductive photoperiod, which of the following developmental outcomes is most likely to occur?
Options
- A.
The shoot apical meristem will rapidly differentiate into a floral primordium due to auxin-mediated cellular proliferation.
- B.
Floral induction will be suppressed, as the high auxin ratio promotes vegetative maintenance and antagonizes the florigen-mediated phase change.
- C.
The plant will exhibit accelerated bolting and immediate flowering due to the synergistic effect of auxin and endogenous gibberellins.
- D.
The apical meristem will undergo premature senescence due to the antagonistic suppression of cytokinins by high auxin levels.
Check Your Answer
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
Synergids|Embryo Sac|Nucellus|Diploid Egg
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often oversimplify Auxin as a universal 'growth promoter' and assume it facilitates all apical development, including flowering.
The trap lies in failing to distinguish between vegetative maintenance (driven by high Auxin/apical dominance) and reproductive transition, which requires a specific shift in the Cytokinin-Auxin ratio to allow floral organogenesis.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Plant Kingdom - Class 11 |
| Concept | Sexual Reproduction Variations |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |