';the flying squirrel of north america closely resembles the flying pholanger of australia they are similar in

size and have long bushy tails and skin folds that allow them to glide through the air the squirrel is a placental mammal, while the pholanger is a marsupial these close resembances even though genetically and geographically separated by great distances can best be explained by


a.convergent evolution


b.divergent evolution


c.spontaneous generation


d.vestigial structures





within a decade of the introduction of a new insecticide, nearly all of the descendants of the target pests were immune to the usual sized dose. the most likely explanation for this immunity to the insecticide is that


a. eating the insecticide caused the bugs to become resistant to it


b.eating the insecticide caused the bugs to become less resistant to it.


c. it destroyed organisms that cause disease in the insects, thus allowing them to live longer


d.it selected random mutations that were present in the insect population and that provided immunity to the insecticide





mutations such as polyploidy and crossing over provi';the flying squirrel of north america closely resembles the flying pholanger of australia they are similar in
When two unrelated species develop similar adaptations it is called convergent evolution.





resistance to insecticides (or any ';pesticide';) is usually a result of natural selection.

makeup online