Eukaryotes are single-celled organisms that lack a distinct membrane-bound nucleus and other specialized structures. True False

False, Eukaryotic cells have membranes. Prokaryotic cells do not have a membrane.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

trachea, alveoli, lung capillaries, arteries