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Question #45179
The Question
A transgenic tobacco plant utilizing RNA interference (RNAi) successfully eradicates its primary native pest, the nematode Meloidogyne incognita, from an agricultural field. A few seasons later, an alien nematode species, which previously existed in negligible numbers in the same soil, undergoes a massive population explosion and becomes a severe pest. Which of the following ecological concepts best explains this unintended consequence of the biotechnological intervention?
Options
- A.
The alien species experienced ecological release due to the removal of its superior competitor, occupying the newly vacant niche.
- B.
The alien species underwent resource partitioning to avoid competitive exclusion by the transgenic tobacco plant.
- C.
The RNAi-induced transposons in the plant triggered a sudden genetic mutation in the alien nematode, increasing its biotic potential.
- D.
The native nematode and alien nematode previously exhibited mutualism, which shifted to amensalism upon RNAi intervention.
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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
RNAi Vector Source|Co-extinction Logic|Biotic Interactions
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Integrating Biotechnology with Ecosystem Dynamics.
Students often view genetic modifications (like RNAi) in isolation, focusing only on the target pest.
The trap lies in failing to recognize that eradicating a keystone pest alters community interactions, specifically demonstrating 'Ecological Release'—a phenomenon where a species expands its niche when a dominant competitor is removed.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biotechnology and Its Applications - Class 12 |
| Concept | RNAi Vector Source |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |