Nhận biết (M1)

Mila Pajkovic and colleagues relied on historical DNA (hDNA)—genomic data incidentally preserved in specimens housed in collections such as those at the American Museum of Natural History—to investigate genetic erosion in the butterfly species Erebia embla and Lycaena helle. Although this approach can yield many insights about the biological past, it remains a relatively underutilized resource in part 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.

Which choice best states the main idea of the text?

• A.

  While some scientists have embraced the use of hDNA others have expressed concerns about the reliability of the data produced by hDNA studies.

• B.

  While hDNA has recently attracted the attention of some scientists, other sources of genomic data are likely to become more widely utilized in the future.

• C.

  While hDNA has yielded many revelations about evolutionary history, it is relatively underused due to a shortage of specimens from the appropriate time periods.

• D.

  While hDNA has potential for enhancing scientists' understanding of the evolutionary past, the difficulty of deriving viable data from it at present has limited its use.