Salt, or nacl, is an example of a(n) a. molecular compound c. ionic compound b. element d. mixture

thymine. in rna, thymine is replace by uracil

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.

a lot of people sadly don't know the best way to learn is cheating off of your friends or this amazing thing called google

yes

explanation

they do and it slaps