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Question #47550
The Question
Analyze the following statements regarding the evolutionary and anatomical constraints of plant vascular systems. Which of the following statements is INCORRECT?
Options
- A.
The evolutionary transition from tracheid-dominated xylem in gymnosperms to vessel-integrated xylem in angiosperms significantly increased hydraulic efficiency.
- B.
In roots, the radial arrangement of vascular bundles dictates an exarch maturation pattern, positioning the protoxylem towards the periphery.
- C.
In dicot stems, the conjoint vascular bundles exhibit an endarch maturation, where the protoxylem is directed towards the pericycle and metaxylem towards the pith.
- D.
Despite lacking vessels, gymnosperm stems possess conjoint, collateral, and open vascular bundles with an endarch primary xylem arrangement.
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
Gymnosperm Endosperm|Cytokinin-Auxin Ratio|Plant Growth and Development
Why This Question Is Tricky
Common Mistakes
Location/Definition Trap: The conceptual pivot is the spatial orientation of protoxylem and metaxylem.
Students often memorize 'Stem = Endarch' but fail to map the exact anatomical coordinates.
The trap correctly identifies the stem pattern as 'endarch' but provides the spatial definition of 'exarch' (protoxylem towards pericycle/periphery), testing deep reading comprehension and anatomical visualization.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Plant Kingdom - Class 11 |
| Concept | Gymnosperm Endosperm Identity |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |