Question

question 3 of 10 which statement best describes how scientists obtain environmental dna (edna) from carp in the waterways near chicago? a. they collect waste and tissue left by the fish and extract dna from it. b. they collect and filter water samples to isolate the dna carp left behind. c. they find and collect carp eggs and extract the dna from them. d. they capture live fish and extract dna directly from their tissues.

Explanation:

Environmental DNA (eDNA) is DNA that organisms shed into the environment. For fish in waterways, scientists typically collect and filter water samples. The water may contain DNA fragments that the fish have released, such as through skin cells, mucus, or feces. Filtering the water isolates this eDNA.

Answer:

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