Aruler is on the table with the higher numbers to the right .an ant crawls along the ruler from 6cm to 2 cm ij 2 seconds

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.