what term refers to the fusion of two haploid gametes, each containing 23 chromosomes, producing a zygote that contains 46 chromosomes?

i think the answer would be d

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.

thats not even an aswer choice