Before You Begin
Question #46173
The Question
Petromyzon (lamprey) exhibits an ectoparasitic mode of life, relying on a specialized buccal funnel to attach to host fishes. If a targeted chemical agent selectively degrades elastin fibers while hyper-stimulating dense collagen synthesis in the connective tissue of the oropharyngeal region, which of the following represents the most direct consequence on its functional anatomy?
Options
- A.
It will lose the ability to generate the negative pressure necessary for suction and attachment to the host.
- B.
It will develop a rigid, jaw-like structure enabling a shift from an ectoparasitic to a predatory carnivorous lifestyle.
- C.
Its horny, keratinized teeth will fail to form, preventing it from rasping the host's flesh.
- D.
The structural integrity of its cartilaginous cranium will collapse, leading to immediate mortality.
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
Cyclostomata Dentition|Connective Tissue Fiber Composition|Structural Organisation in Animals
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Integrating the biomechanical properties of connective tissue fibers (collagen for tensile strength vs. elastin for recoil) with the morphological adaptations of Cyclostomes (sucking mouth).
The trap lies in assuming that 'stronger' tissue (more collagen) is always beneficial, ignoring that suction mechanically requires elasticity to generate a vacuum.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Animal Kingdom - Class 11 |
| Concept | Cyclostomata Dentition |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |