If there is s large amount of lactose present, how does bacteria respond?

a the gene for beta-galactosidase turns on.

b the gene for beta-galactosidase turns off.

c beta-galactosidase production increases.

d lactose is produced.

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.