Free Test Prep GRE Exam Questions

The _______ and _______ lifestyle of certain types of primates differs greatly from the habits of most primate species, who are active during the day and who form societies based on quite complex interrelationships. 

In the figure, O lies at the center of the larger circle. What is the ratio of the smaller circle’s area to the larger circle’s area? 

TOPAZ : YELLOW 

SHIP : ARMADA 

Alaska’s climate has been gradually warming over the past two decades, Over the same period the spruce-bark beetle has killed unprecedented millions of acres of Alaska’s spruce trees. Clearly, this devastation is attributable to the warming trend: not only have the recent warm summers in Alaska halved the time it takes a beetle to develop from an egg. leading to a dramatic increase in the beetle’s population, but ____________. Which of the following most logically completes the argument?