Explain how temperature is a limiting factor for a cactus in the desert

Areal dna molecule consists of thousands of these pairs of nucleotides. what is the pairing arrangement of the nitrogen bases

Has anyone taken the genetics unit test in connexus? not looking for answers, just a little bit what to expect and some with studying.

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