Nhận biết (M1)

Michael G. Campana and colleagues relied on historical DNA (hDNA)—genomic data incidentally preserved in specimens housed in natural history collections—to investigate the evolutionary origins of a fungal pathogen affecting bats. Although this approach offers unique benefits, such as access to genomic data from extirpated populations, it remains a relatively underutilized resource because hDNA is often to some extent degraded, a situation not easily remediable under current methodological paradigms and with extant DNA extraction and analysis technologies.

Information in the text best supports which statement about hDNA?

• A.

  It may yield insights that other types of genomic data cannot.

• B.

  It has thus far proved valuable mainly to researchers studying pathogens.

• C.

  It may be underused because of its controversial status among scientists.

• D.

  It tends to be much more degraded than other types of DNA of comparable age.