2022-05-19 09:53:19



  A study estimated that brown bears populate the Kenai Peninsula of Alaska at a density of 42 brown bears per 1000 km^2 of habitable area. According to this study, approximately how many brown bears populate an 8500 km^2 habitable area of this peninsula?







  Choice C is correct.

  Writing & Language

  Some plant pathologists have turned to genetic engineering to devise new ways of responding to botanical diseases. Plant pathologist William Powell, for instance, teamed up with forest biologist Chuck Maynard to restore North America's population of American chestnut trees, which was decimated in the early 1900s by a fungus known as chestnut blight. A fungus, C. parasitica, contributes to the growth of cankers on the trees' trunks; these cankers, in turn, prevent a tree from transporting water from their roots to their branches and leaves. To render American chestnut trees resistant to the blight, Powell and Maynard experimented with altering the genetic makeup of the trees. The resultant genetically engineered trees are called Darling 4 American chestnut trees, and during the first 15 weeks after infection with chestnut blight, they grow cankers that are much smaller than those that grow on American chestnut trees.



  C.that tree



  Choice B is the best answer because it maintains agreement between the plural noun "trees" and the plural pronoun "their." This choice is also consistent with the first part of the sentence's use of plural.

  Critical Reading>Select an Answer

  Conceptually, everybody is in favor of the right to vote. You will not hear anybody defend the notion that the law can discriminate against persons because of their color, or their faith, or their ethnicity, when it comes to going to cast a ballot. That's huge progress, a normative shift in how we think about our democracy. Everybody in theory is supposed to be included.

  But part of the reason we're here today, part of the reason it's so important for us to focus attention on this right is because in practice, we've still got problems.

  On the ground, there are still too many ways in which people are discouraged from voting. Some of the protections that had been enshrined in the Voting Rights Act itself have been weakened as a consequence of court decisions and interpretations of the law. State legislatures have instituted procedures and practices that, although on the surface may appear neutral, have the effect of discouraging people from voting, may have a disproportional effect on certain kinds of folks voting.

  And if, in fact, those practices, those trends, those tendencies are allowed to continue unanswered, then over time the hard-won battles of 50 years ago erode, and our democracy erodes. And that means that the decisions that are made in the corridors of power all across this country begin to reflect the interests of the few, instead of the interests of the many.

  So we've got serious business to attend to here. One order of business is for our Congress to pass an updated version of the Voting Rights Act that would correct some of the problems that have arisen.

  Obama uses the word "business" twice in the last paragraph most likely in order to _____

  A.indicate that practical steps should be taken.

  B.identify the source of a persistent problem.

  C.suggest a way to fix a broken system.

  D.shift attention to another group of people.



  Choice A is the best answer. In the last paragraph, Obama states that "we've got serious business to attend to" and that "one order of business is for our Congress to pass an updated version of the Voting Rights Act." By repeating the word "business," Obama is emphasizing that the problems with voting are practical, not theoretical, and need to be addressed right away through practical steps.