Statement 1 is incorrect. DNA barcoding is a method for identifying species using a short, standardized sequence of DNA. It provides a "barcode" that is unique to a species, but it does not provide information about the age of an individual plant or animal. Statement 2 is correct. DNA barcoding is highly effective at distinguishing among species, even those that are morphologically similar or difficult to identify using traditional methods. The barcode sequence provides a clear genetic signature for differentiation. Statement 3 is correct. DNA barcoding can be used to identify the species composition of biological materials in processed foods, allowing detection of adulteration, mislabeling, or the presence of undesirable or allergenic plant or animal materials.