Question

question 1 of 10
which statement best describes how scientists obtain environmental dna (edna) from carp in the waterways near chicago?
a. they find and collect carp eggs and extract the dna from them.
b. they capture live fish and extract dna directly from their tissues.
c. they collect waste and tissue left by the fish and extract dna from it.
d. they collect and filter water samples to isolate the dna carp left behind.

Explanation:

Environmental DNA (eDNA) is DNA that is shed by organisms into their environment. For aquatic organisms like carp, this DNA can be found in water. Scientists collect water samples, filter them (to concentrate the DNA), and then isolate the eDNA. Options A and B involve direct collection from eggs or live fish tissues, which is not the typical eDNA sampling method. Option C is about waste and tissue left by the fish, but the most common and non - invasive way for aquatic eDNA is water sampling and filtering.

Answer:

D. They collect and filter water samples to isolate the DNA carp left behind.