Question

which statement best describes the use of a control sample that is known to be from bighead carp in edna surveillance? a. as a negative control to show if there are bighead carp present in the area b. as a negative control to compare with the markers of known fragment sizes c. as a positive control to compare with the markers of known fragment sizes d. as a positive control to show if there are bighead carp present in the area

Explanation:

A positive control contains the target substance (in this case, DNA from bighead carp). It is used to compare with other samples and known fragment - size markers to validate the detection method. A negative control would not have the target DNA.

Answer:

C. As a positive control to compare with the markers of known fragment sizes