Researchers want to use edna to look for an invasive species in a waterway. which of the following steps should they do first? a. sort the edna into bands on a gel. b. cut the edna into fragments of different sizes. c. isolate edna from water samples taken from the waterway. d. compare the edna with a positive control.

Which best describes a rhinovirus? o a. a virus that causes a common cold o b. a protective shell around a virus o c. a tube the comes off a virus o d. a piece of dna transferred by a virus

Why do oceanic plates tend to subduction when colliding with a continental plate

Study the picture of the ocean. which is the best example of an organism’s niche shown in the picture? a. the environment contains several of the same species of coral. b. the shallow area of the ocean meets the needs of the coral and the fish. c. the ocean has fish and coral that live in the same area. d. the coral take in food from the water and provide shelter for the fish.