3.7] E.g., end-Cretaceous event caused demise of most dinosaurs, accounted for fact that mammals and birds so prevalent today Often opens up opportunity for adaptive radiations of new forms, i.e., changing ecological roles Extinction is the rule, rather than the exception Extinction depends on both &quot;Bad Genes&quot; (inability to adapt to changing environments) and &quot;Bad Luck&quot; (such massive changes in environment, e.g., due to asteroid impact, that few species survive, no matter what their genetic composition) Life-history traits that make species sensitive to extinction?
(end-Cretaceous event; caused; demise of most dinosaurs) (that mammals and birds so prevalent today Often opens up opportunity for adaptive radiations of new forms, i.e., changing ecological roles Extinction is the rule, rather than the exception Extinction; depends; on both &quot;Bad Genes&quot; (inability to adapt to changing environments) and &quot;Bad Luck&quot) (no matter what their genetic composition) Life-history traits; make; species sensitive to extinction) (few species; survive; )
end-Cretaceous event that mammals and birds so prevalent today Often opens up opportunity for adaptive radiations of new forms, i.e., changing ecological roles Extinction is the rule, rather than the exception Extinction no matter what their genetic composition) Life-history traits few species
caused depends make survive
demise of most dinosaurs
on both &quot;Bad Genes&quot (inability to adapt to changing environments) and &quot;Bad Luck&quot
species sensitive to extinction