Apopulation of fruit flies on an island lay their eggs in some rotting fruit. some of the fruit is blown into the ocean by a storm and washes up on another island that is too far apart for the flies to fly back to their original island. over time the two populations change so much that they are different species. what must be true of the two populations of flies at this point? a) they will be genetically identical. b) they will share no genetic material. c) they will be able to produce offspring. d) they will not be able to produce offspring.

Cold case files recently began re-investigating an old murder case. the murder took place in the park; a young man, james, was hit over the head with a brick and killed. police suspected the jealous former boyfriend of james' wife, karen. whoever killed james may have washed their hands in a near-by bird bath as detectives found blood in the bird bath. since the murder took place before dna fingerprinting was available, the suspected killer, ronnie, went free. detectives are now reviewing the blood evidence using dna fingerprinting. based on the dna fingerprints of all possible suspects, who is james' killer?