Biofacts, or ecofacts, are one of the categories of evidence archaeology examines.

The Wikipedia defines them as "organic material found at an archaeological site that carries archaeological significance. Biofacts are natural objects found alongside artifacts or features, such as animal bones, charcoal, plants, and pollen. Biofacts are passively consumed or handled by humans; as opposed to artifacts, which are purposefully manipulated. Biofacts reveal how people respond to their surroundings. A common type of biofact is a plant seed."

While they are not explicitly mentioned by the Wikipedia, human remains are also considered biofacts or ecofacts.  As such, the research of DNA would also fall under this category of archaeological evidence.

In the context of xenoarchaeology, biofacts also include extraterrestrial remains, extraterrestrial DNA, etc.

 Source: Manuel Lamiroy, Introduction to Xenology, 2020.