Why is there no such thing as a food chain

The image below shows a weather service map. which details best describe this map? check all that apply

Awolf pack hunts,kills, and feeds on a moose. in this interactions, the moose is a?

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different