Before You Begin
Question #46923
The Question
A taxonomist examines static museum slides of a photosynthetic, flagellated protist that lacks a cell wall. Observing extreme variations in body shape among the specimens, the taxonomist erroneously classifies them into three distinct species. Which structural feature of the organism and corresponding biological phenomenon, often obscured in classical dead-specimen taxonomy, best explains this error?
Options
- A.
A protein-rich pellicle allowing transient phenotypic plasticity.
- B.
A cellulosic cell wall undergoing environmentally induced plasmolysis.
- C.
Siliceous frustules exhibiting seasonal morphological dimorphism.
- D.
A rigid peptidoglycan envelope demonstrating rapid genetic mutation.
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
Museum vs. Herbarium Logic|Defining Properties Criteria|Euglenoid Pellicle Flexibility
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: The limitation of classical taxonomy (relying on static, dead specimens in museums/herbaria) when dealing with organisms exhibiting high phenotypic plasticity.
Students must synthesize the NCERT structural fact (pellicle = flexibility) with the conceptual limitation of taxonomical aids (museums preserve static states, missing dynamic physiological adjustments).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | The Living World - Class 11 |
| Concept | Museum vs. Herbarium Logic |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |