5. Which of the following explains a way in which metamorphic rocks are formed? a. through intense changes in heat
b. through intense change in pressure
c. through chemical changes
d. All of the above explain ways in which metamorphic rock can occur.

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.