Egg and sperm cells
a. are produced by mitosis
b. are produced by meiosis
c. contain 46 chromosomes each
d. are diploid

is this a psat question, if so do not cheat try your best.

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.

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