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Question #46237
The Question
A plant in an arid ecosystem faces severe water stress, threatening the continuity of its transpiration pull. It responds by synthesizing a specific phytohormone that induces a state of suspended metabolism, ecologically analogous to diapause in insects. Which of the following statements is INCORRECT regarding this physiological state and its associated mechanisms?
Options
- A.
The phytohormone responsible for this state is a derivative of carotenoids and acts as a general plant growth inhibitor.
- B.
The induced dormancy represents an 'escape in time' strategy, similar to the diapause exhibited by many zooplankton species in lakes.
- C.
To conserve water, the phytohormone induces stomatal closure by promoting the active influx of potassium ions (K+) into the guard cells.
- D.
Despite the suspended metabolic state, any minimal water transport required is still driven by the negative hydrostatic pressure of the cohesion-tension mechanism.
Check Your Answer
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
Leaf_Venation_Patterns|Diapause_vs_Hibernation|Respiratory_Volume
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: The exact mechanism of stomatal closure.
Students frequently associate potassium (K+) influx with stomatal activity but fail to distinguish between the conditions for opening (influx) and closing (efflux).
Furthermore, integrating plant dormancy with animal diapause tests cross-chapter synthesis (Plant Physiology + Ecology).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Morphology of Flowering Plants - Class 11 |
| Concept | Leaf Venation Patterns |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |