The answer is C
Environmental DNA (eDNA)
surveillance
Environmental DNA (eDNA) refers
to DNA that can be extracted from environmental samples, such as water, soil or
faeces, without first isolating any target organisms. It can also result from
the decomposition of dead organisms. All living organisms, regardless of their
size or ecology, leave traces of DNA in their environments, reflecting their
current or past presence. eDNA is characterized by a complex mixture of
nuclear, mitochondrial or chloroplast DNA, and can be intracellular (from
living cells) or extracellular. It enables the detection of a species
regardless of its life stage or gender. This technology has the potential to
eliminate the need to capture or visually detect a target species, making it a
particularly attractive alternative as a stand-alone assay for organisms that
are hard to capture, difficult to collect, or that have small populations.
