What behavioral trait(s) prevents interbreeding between different finch species?

Assume you are studying a species of slug where the eggs are fertilized and transferred to the male. As a result the male is not able to increase reproductive success by mating with multiple partners. Therefore which of the following about sexual selection in this species is not true?      Females are more likely to develop traits that signal genetic quality to males.      Females will be able to increase reproductive success with increased mating partners.      Sexual selection in males will lead them to be choosy with what females they mate with.      Sexual selection in males will lead them to mate indiscriminately when they find a female.

Which type of selection best describes the shift in peppered moth from the light form to the dark form following the industrial revolution? Directional Stabilizing Disruptive 58

Scientists have also noticed unusual coloration among certain condor populations. Andean condors are typically black in color.  However, a few unique white feathered individuals have occasionally been noted. These white feathered individuals are not well-camouflaged, and are easily spotted by larger predators.  Recently, scientists noted that a black feathered condor had mated with a white-feathered condor, and their three chicks all appeared to have gray feathers. Closer examination of these condor chicks revealed that the chicks actually possessed a mixture of black feathers and white feathers, giving them a gray appearance from a distance. Please NAME and EXPLAIN the genetic phenomenon described here.