Aging affects all of the body's cells; and therefore, the basic building blocks of tissues. all cells in the body experience changes with aging. as your body changes, becoming stiff making the organs, blood vessels, and airways more rigid.
a) bones
b) muscle
c) cartilage
d) connective tissue

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.