What do cellular respiration and fermentation have in common? They both harvest energy from sugars. They both end up with pyruvic acid. They both occur in the mitochondria. They both require oxygen to occur.

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.

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.