Official Answer Key & Detailed Solution
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Correct Answer: Option (D) — 2 and 3
Concept & Option Breakdown
Standard Reference VerifiedStatement 1 is incorrect: DNA barcoding is used for taxonomic species identification based on standard short genetic sequences; it cannot determine the chronological age of an individual organism (which relies on techniques like carbon dating or dendrochronology). Statement 2 is correct: DNA barcoding allows precise differentiation among morphologically identical or cryptic species. Statement 3 is correct: It is extensively used in food safety and authentication to detect adulteration and identify biological components in processed foods.
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