Researchers want to use edna to look for an invasive species in a waterway. which of these steps should they do first? a. sort dna into bands on a gel. b. amplify the amount of dna. c. cut dna into small pieces. d. precipitate dna in each sample.

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a. changes in genetics in human populationsb. antibiotic resistance in bacteria populationsc. pesticide resistance in garden insectsd. changes in the color of the peppered moth population in england