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Question #46932
The Question
The traditional taxonomic hierarchy and Whittaker's five-kingdom classification face significant challenges when defining discrete biological boundaries. Which of the following statements regarding these taxonomic limitations is INCORRECT?
Options
- A.
Lichens are excluded from Whittaker's five-kingdom classification because they represent a symbiotic ecological unit rather than a single, independent phylogenetic lineage.
- B.
The Biological Species Concept perfectly resolves the taxonomic ambiguity of holobionts like lichens by classifying them as a single species based on their combined ecological function.
- C.
In dinoflagellates, classification based strictly on morphological features like thecal plate arrangement often fails to account for their vast metabolic heterogeneity, such as varying toxin production.
- D.
The traditional Linnaean hierarchy assumes discrete boundaries between organisms, making it difficult to classify entities that function as a single physiological unit but possess genomes from entirely different kingdoms.
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Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Evolutionary_Exception
Tackle problems where standard rules evolve or change based on specific environmental constraints.
Concepts Behind This Question
Systematic Classification Scope|Lichen Symbiotic Logic|Dinoflagellate Bioluminescence and Toxins
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often confuse an 'ecological unit' with a 'taxonomic species'.
The trap exploits the strict definition of the Biological Species Concept, which relies exclusively on reproductive isolation, not functional or ecological unity.
Because lichens act as a single physiological unit, students might falsely assume modern species concepts easily accommodate them, ignoring the dual-genome reality that breaks traditional phylogenetic classification.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | The Living World - Class 11 |
| Concept | Systematic Classification Scope |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |