What type of evidence does cosmic background radiation provide about the origins of the universe? A. It supports predictions of the composition of the early universe.
B. It pinpoints the size of the original universe.
C. It verifies that the early universe was once extremely hot.
D. It proves that the universe is expanding.

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.