The diagram shows a nucleic acid in the shape of a double helix.
which sugar is present in the nucleic acid that is represented in the diagram?
phosphate
uracil
deoxyribose
ribose

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.