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Question #46465
The Question
Which of the following statements regarding the evolutionary chronology and experimental validation of the origin of life is INCORRECT?
Options
- A.
S.L. Miller's spark-discharge experiment provided direct experimental evidence for the abiotic synthesis of self-replicating metabolic units (coacervates).
- B.
Oparin and Haldane proposed that the formation of life was preceded by chemical evolution, where diverse organic molecules formed from inorganic constituents.
- C.
The first non-cellular forms of life, which were likely giant macromolecules like RNA, proteins, and polysaccharides, originated around 3 billion years ago.
- D.
The first cellular forms of life were probably single-celled entities that originated exclusively in an aquatic environment around 2000 million years ago.
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
Miller-Urey_Experiment|Chemical_Evolution|Coacervates
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Distinguishing between the synthesis of organic monomers (Chemical Evolution) and the emergence of self-replicating systems (Biological Evolution).
Students commonly conflate Miller's successful synthesis of amino acids with the creation of complex protobionts or 'life' in the lab, missing the NCERT distinction that Miller only validated the first step of chemical abiogenesis.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Evolution - Class 12 |
| Concept | Evolutionary Chronology |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |