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Question #46992
The Question
Two fungal species, Mucor (Species A) and Penicillium (Species B), are competing in a shared ecological niche. Initially, Mucor rapidly colonizes the nutrient-rich substrate, but over time, Penicillium outcompetes it when the environment becomes resource-limited and prone to mechanical micro-damage. Which of the following structural trade-offs best explains this ecological succession?
Options
- A.
Mucor has an aseptate, coenocytic mycelium allowing rapid cytoplasmic streaming for fast colonization, but lacks the septal compartmentalization that protects Penicillium from extensive protoplasmic loss during damage.
- B.
Mucor utilizes septal pores to rapidly translocate nutrients for fast growth, whereas Penicillium relies on a coenocytic structure to localize resources into distinct, protected compartments.
- C.
The exogenous production of aplanospores in Mucor allows rapid dispersal, whereas the endogenous conidia of Penicillium provide a survival advantage in resource-limited conditions.
- D.
Mucor exhibits a low surface-area-to-volume ratio due to its septate hyphae, making it a poor competitor in resource-limited niches compared to the aseptate Penicillium.
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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
Phycomycetes_Aseptate_Hyphae|Baculovirus_Host_Specificity|Parasitic_Adaptations
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often rote-memorize 'Phycomycetes = aseptate/coenocytic' and 'Ascomycetes = septate' without understanding the physiological implications.
This question forces the synthesis of NCERT morphological facts with the ecological concept of competitive exclusion.
It also integrates a classic NEET 'Location Trap' in Option C by swapping the endogenous/exogenous origins of asexual spores.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biological Classification - Class 11 |
| Concept | Phycomycetes Aseptate Hyphae |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |