What is the purpose of the sharps disposal in a laboratory?

One of the purposes of transcription is to produce a sequence of bases that

In the diagram below, the northern hemisphere would be in what season at position a a. fall b. winter c. summer d. spring

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