If a large number of genes were mapped, how many linkage groups would be found in a bacterial cell with a single circular dna molecule

im not in connections yet but i might can you some questions. what grade are you in?

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.