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Question #46901
The Question
In a marine ecosystem, a mutant strain of the cnidarian Obelia is discovered in which a regulatory gene failure completely suppresses the development of the medusa stage. Based on the principle of metagenesis, which of the following represents the most accurate biological consequence for this mutant colony?
Options
- A.
The colony will be restricted to a sessile existence and completely lose the ability to undergo sexual reproduction.
- B.
The polyps will undergo a compensatory shift to produce gametes directly, similar to the mechanism seen in Hydra.
- C.
The colony will lose its ability to grow vegetatively, as the medusa is the primary feeding and growing stage.
- D.
The suppression of the medusa stage will trigger the direct asexual formation of a free-swimming planula larva.
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
Cnidarian Polymorphism|Growth-Reproduction Mutual Exclusivity|Animal Kingdom
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Understanding the strict division of labor in metagenesis (Polyp = sessile/asexual/vegetative; Medusa = free-swimming/sexual).
The trap lies in Option B, exploiting the common misconception that all polyps can produce gametes if forced, confusing the specialized colonial Obelia with the solitary Hydra.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | The Living World - Class 11 |
| Concept | Growth-Reproduction Mutual Exclusivity |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |