Admission Tests GRE Exam With Confidence Using Practice Dumps

In 1995 the United States National Park Service reintroduced wolves into Yellowstone National Park, from which they had been eliminated decades before by overhunting. Biologists hoped the reintroduction would return the park's mix of animals to a more natural state. After the wolves disappearance, the population of their onetime prey, the elk. had burgeoned. Subsequently, new tree growth declined as multiplying elk browsed young trees, denuding certain areas of the park. Following the wolves" return, the elk population declined and young trees rebounded. Most scientists attribute the vegetation changes to the wolves1 return. However. Ration observes that Yellowstone has not had a harsh winter since wolf numbers reached high levels and suggests that elk may not have needed to resort to trees for food.

It can be inferred from the passage that the scientists would he most likely to cite which of the following in support of their view?

To help the reader understand the actions of and the decisions made by people of another time, the historian's narrative must be_________what they knew; the narrative should not refer to anything not known until later.

Age data from meteorites suggests that, in contrast to the relatively_________pace of planetary evolution we are

witnessing today, the first ten million years or so of our solar system history were extremely eventful.