Base your answer on the cross section below and on your knowledge of earth science. the cross section represents processes in the water cycle. arrows represent the movement of water. letters a, b, c, and d represent locations on earth's surface.

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.