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Question #47501
The Question
The structural organization of a lichen thallus represents a unique biological phenomenon where the phycobiont and mycobiont form a complex, tissue-like body. Regarding the morphogenesis and cellular differentiation in this obligate symbiotic association, which of the following statements is INCORRECT?
Options
- A.
The distinct thallus architecture is an emergent phenotype absent in the free-living cultures of either the algal or fungal partner.
- B.
The fungal hyphae undergo dedifferentiation to form a primary meristematic tissue before enclosing the algal cells to form the thallus.
- C.
The morphological differentiation of the mycobiont into distinct zones, such as the cortex and medulla, is strictly induced by its interaction with the phycobiont.
- D.
This association demonstrates community-driven morphogenesis, where tissue-like differentiation is dictated by interspecific signaling rather than a single isolated genome.
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
Standing Crop quantification|Lichen Symbiotic Logic|Succession
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often conflate 'tissue plasticity' or 'forming a new structure' with the strict botanical definition of 'dedifferentiation' (regaining division capacity to form a meristem).
The trap exploits the misconception that because lichens resemble lower plants (thallophytes), their fungal components undergo plant-like developmental pathways.
Fungal morphogenesis relies on hyphal aggregation (pseudoparenchyma), not meristems.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biological Classification - Class 11 |
| Concept | Lichen Symbiotic Logic |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |