You briefly expose bacteria undergoing dna replication to radioactively labeled nucleotides. when you centrifuge the dna isolated from the bacteria, the dna separates into two classes. one class of labeled dna includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of dna (several hundred to a few thousand nucleotides in length). which two classes of dna do these different samples represent?

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form

One of the reasons that stars are so large is because

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.