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Question #47513
The Question
A population of mosses experiences a severe environmental shift characterized by prolonged aridity and extreme soil nutrient immobility. Consequently, the population faces a complete reproductive bottleneck and local extinction. Which of the following statements regarding the physiological and structural causes of this bottleneck is INCORRECT?
Options
- A.
The lack of a continuous water film prevents the chemotactic movement of biflagellate antherozoids, directly halting fertilization.
- B.
Nutrient immobility in the substrate prevents the spores from germinating into a free-living, multicellular prothallus, terminating the haploid phase.
- C.
The failure of the dominant gametophytic generation to establish inevitably prevents the formation of the nutritionally dependent sporophyte.
- D.
The creeping, green, and filamentous primary protonema stage is highly susceptible to localized soil nutrient exhaustion before leafy shoots can develop.
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
Carotenoids|DNA_Repair_Enzymes|Photolyase
Why This Question Is Tricky
Common Mistakes
The 'Conceptual Pivot' is the precise terminology of the gametophytic stages across different plant divisions.
Students frequently conflate 'Protonema' (Mosses) with 'Prothallus' (Pteridophytes) because both are free-living, haploid structures arising from germinating spores.
The trap leverages a scientifically plausible ecological scenario (nutrient immobility halting germination) but inserts a fatal taxonomic error.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Plant Kingdom - Class 11 |
| Concept | Algal Pigmentation Logic |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |