Explain briefly, the phylogenetic development/modification of the skulls across the different vertebrate classes

15. Flying squirrels, sugar gliders, and colugos are all mammals that glide using a flap of skin between the forelimbs and hindlimbs. They are not closely related and are found in North America, Australia, and Malaysia, respectively. How did they all evolve a similar structure when they are not closely related? 16. Since dinosaurs are now extinct, does that mean that birds (the dinosaurs" closest living relative according to the tree) are also on their way to becoming extinct? Why or why not?

95.The stratigraphic range of cephalopods as a whole is Ordovician to Recent T F

25.