Genes<span> are distinct portions of an organism’s </span>DNA<span> that correspond with a specific trait, while </span>alleles<span> are different versions of a given </span>gene<span>. </span>
Meiosis.
Meiosis results in four cells of the original, each with a halved amount of chromosomes, you could say.
25) D hypertonic
23) active transport
Those are the ones I know (sorry I couldn't help with the other ones... I'm studying for my exam) ^-^