which statement provides the best evidence that ambulocetus natans is an ancestor of basilosaurus isis

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer

One of the reasons that stars are so large is because