In contrast to linear dna replication, circular dna replication typically: occurs only at a single replication fork. does not produce okazaki fragments. has a single origin of replication. all of these choices are correct. does not produce a replication bubble.

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.