Scientists group organisms based on their common characteristics. which characteristic would be used to construct a cladogram of a particular bird species? a. habitat of the birds b. physical traits of the birds c. types of food consumed by the birds d. methods of reproduction exhibited by the birds

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.