At the end of which geologic era did a large mass extinction take place that wiped out more than 90% of all marine life?

What is one possible reason a constitutional monarchy developed in england while an absolute monarchy continued in russia

The quote below is an excerpt from the charter of the united nations: "the purposes of the united nations are: to maintain international peace and security, and to that end: to take effective collective measures for the prevention and removal of threats to the peace, and for the suppression of acts of aggression or other breaches of the peace, and to bring about by peaceful means, and in conformity with the principles of justice and international law, adjustment or settlement of international disputes or situations which might lead to a breach of the peace . " source:this section implies that the united nations is prepared to do what to keep world peace?

Which statement below best explains the meaning of the 3rd resolution? a. residents of the colonies do not occupy a lesser status than citizens who live in england, the motherland. b. the meaning of freedom is that individuals never have to pay taxes. c. free people are capable of and should take responsibility for their own tax obligations and the purposes they serve. d. the stamp act congress, with this document, is giving permission--consent--to have taxes imposed upon them by parliament. e. americans have different ideas about rights and freedom than englishmen.