Organisms that have two different alleles for a trait are said to be a. homozygous. b. heterozygous. c. purebred. d. recessive.\

Your answer is B.) Heterozygous, since the prefix 'hetero' usually means separate or different. Hope this helps.

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.