Which of these poses the greatest threat to the savannah area of africa

Rank the following from most to least devasting: ordovician,permaian,cretaceous, pleistocene

The procedures for reporting potential unanticipated problems involving risk to subjects or others to the irb are: stated in the human subject protection regulations, but not in the drug or device regulationsincluded in the consent processdetermined by research staffdetermined by the institution in its written policies and procedures

Which entity owns most if the television stations, radio stations, and newspapers in the united states