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Question #113431
The Question
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): In Periplaneta americana, the Malpighian tubules bypass the need for a complex, high-pressure renal ultrafiltration system to eliminate nitrogenous wastes. Reason (R): Cockroaches are uricotelic; their glandular and ciliated tubule cells actively absorb wastes from the hemolymph and convert them into insoluble uric acid, allowing the hindgut to reabsorb almost all water.
In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- A.
Both (A) and (R) are correct and (R) is the correct explanation of (A)
- B.
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
- C.
(A) is correct but (R) is not correct
- D.
(A) is not correct but (R) is correct
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
Nitrogenous Waste Classification|Cockroach Excretory Malpighian Tubules|Level of Organization
Why This Question Is Tricky
Examiner Levers
Logical Assertion
Tests the causal relationship between two true statements.
Difficulty Boost : +4Common Mistakes
Conceptual Pivot: Understanding the evolutionary link between the biochemical nature of nitrogenous waste (uricotelism) and the anatomical mechanism of excretion (active secretion vs. ultrafiltration).
Students often memorize that Malpighian tubules excrete uric acid but fail to connect that the insolubility of uric acid is exactly what eliminates the need for high-pressure, water-heavy filtration systems, allowing a decentralized, open-circulatory organism to survive in arid environments.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Animal Kingdom - Class 11 |
| Concept | Level of Organization vs. Germ Layers |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |