Consider the following statements:

DNA Barcoding can be a tool to:

1. assess the age of a plant or animal.

2. distinguish among species that look alike.

3. identify undesirable animal or plant materials in processed foods.

Which of the statements given above is/are correct?

The correct option is 2 and 3.

DNA barcoding is a modern taxonomic method that uses a short, standardized genetic sequence (a "barcode") from a specific gene or genes to identify a particular species. Let us evaluate each statement to understand why this option is correct:

1. Statement 1 is incorrect: DNA barcoding is used for species identification and taxonomic classification. It does not provide information about the chronological age or physical maturity of an individual plant or animal. Techniques like dendrochronology (counting tree rings) for plants or radiocarbon dating and skeletal analysis for animals are used to assess age.

2. Statement 2 is correct: Because DNA sequences vary between different species but are highly similar within a single species, DNA barcoding is an excellent tool to distinguish between cryptic species or species that look physically identical (morphologically similar) but are genetically distinct.

3. Statement 3 is correct: Even when agricultural or animal products are processed, cooked, or mixed into food products, their DNA often remains intact enough to be analyzed. DNA barcoding can detect and identify the exact species present in processed food, helping to uncover food fraud, adulteration, or the inclusion of undesirable or prohibited plant/animal materials.

Therefore, statements 2 and 3 are correct, making 2 and 3 the right choice.