As originally formulated, the selfish-herd theory of prey species aggregation assumed that predatory attacks were equally likely to be launched from any position within the environment. In some circumstances (e.g.. avian predators attacking prey from above), such an approach is appropriate. However, as James et al. argue, in many predator-prey associations, attacks are unlikely to occur from positions within the group. For example, it is likely that an ambushing predator waiting in the path of a group would be detected before the group moves over its position. Hence, in many ecological situations, predatory attacks on grouped prey will occur exclusively from outside the group. In such circumstances, there is a strong premium to a group member in being in the interior of the group.
James would most likely describe the original formulation of the selfish-herd theory as
Recent research has identified_________bats' navigational tool, echolocation: smooth, vertical surfaces
such as the metal or glass plates on buildings can trick a bat into thinking it is flying in open air.
The highly dispersed nature of Panzaleo pottery throughout present-day Ecuador has led archaeologists to speculate about the pottery's origins and significance. Jijon y Caamano attributed the pottery's distribution to trade, and based on the large quantities of pottery recovered in the Ambato-Latacunga region of the central Ecuadorian highlands, he proposed that region as the probable locus of production. However. Porras suggests that inhabitants of the subtropical eastern Andean slopes, or montafta, were the original producers of Panzaleo. Porras: theory involves the forced migration of the montaria population from their homeland in the Quijos River valley into the Ecuadorian highlands. The gradual exodus and ensuing dispersal of the makers of this ware could account for the diffuse distribution of the materials.
The passage cites evidence supporting which of the following hypotheses?
In the late eighteenth and early nineteenth centuries, during the period of the American Revolution and the early republic, political poems appeared regularly in newspapers and pamphlets. commenting on the issues and controversies engaging the new nation. Given the sheer number of poems that engaged explicitly with politics, one might wonder why the form has remained largely ignored by scholars of early American literature even as many other once obscure forms—sentimental novels, diaries, travelogues, belles letters—have enjoyed unprecedented scholarly interest in recent decades. Part of the reason may stem from frustrations involved with reading poems that are so highly topical—often requiring, even as a condition of first-level comprehension, a familiarity with names and references that, while wholly recognizable in their own time, are obscure to modem readers. Yet beyond this is the fact that American political verse from the eighteenth and early nineteenth centuries has never fully shaken off the verdict, delivered by its earliest generation of scholarly readers. that it is simply unworthy of serious attention as literature. Even the term commonly used to describe it—"verse." as opposed to "poetry"— suggests an occasional or forgettable, rather than enduring, form of expression, not quite deserving the designation of poetry. Nor was such verse considered by early critics as worthy of the designation "American." as the tendency of eighteenth-century American poets to model their works on those of British precursors suggested an unforgivable failure, as one critic described it. to declare their "literary independence" from Britain.
In the context in which it appears highlighted, "obscure" most nearly means
Whereas Hellennan attribured her (i)_________as a pianist to her teacher's pedagogical (ii)_________. her teacher attributed them to Hellennan*s own desultory practice habits.
her teacher
Cole makes the argument that while some advocates of government transparency seem to treat any exposure of state secrets as an (i)_________. that position is (ii)_________; there are many legitimate bases for (hi)_________ disclosures. Cole contends, particularly when they reveal the identities of sources and methods of foreign intelligence.
In 1755 British writer Samuel Johnson published an acerbic letter to Lord Chesterfield rebuking his patron for neglect and declining further support. Johnson's rejection of his patron's belated assistance has often been identified as a key moment in the history of publishing, marking the end of the culture of patronage. However, patronage had been in decline for 50 years, yet would survive, in attenuated form, for another 50. Indeed. Johnson was in 1762 awarded a pension by the Crown—a subtle form of sponsorship, tantamount to state patronage. The importance of Johnson's letter is not so much historical as emotional: it would become a touchstone for all who repudiated patrons and for all who embraced the laws of the marketplace.
The author of the passage mentions Johnson's 1762 pension award in order to
Recently, we have seen the emergence of the food movement, or perhaps we should say "movements." since it is
(i)_________as yet by little more than the recognition that industrial food production is in need of reform because its
social or environmental or public health or animal welfare or gastronomic costs are too high. As that list suggests, the
activists are coming at the issue (ii)_________. Where many social movements, over time, break into various factions
representing differing concerns or tactics, the food movement has been (iii)_________from its beginning.
Sensationalism—the purveyance of emotionally charged content. focused mainly on violent crime, to a broad public—has often been decried, but the full history of the phenomenon has yet to be written. Scholars have tended to dismiss sensationalism as unworthy of serious study, based on two pervasive though somewhat incompatible assumptions: first, that sensationalism is essentially a commercial product, built on the exploitation of modern mass media, and second, that it appeals almost entirely to a simple, basic emotion and thus has little history apart from the changing technological means of spreading it. An exploration of sensationalism's early history, however, challenges both assumptions and suggests that they have tended to obscure the complexity and historicity of the genre.
In the context in which it appears, "charged" most nearly means
Even the most complex models used in fishery management are cartoons of reality. They reduce hundreds of links in food webs to a handful and inadequately represent processes operating over space. Many of their assumptions are as flawed today as those of the simplest models of the past. Fish stocks, for one. are still assumed to be populations of a species that are isolated from one another. Yet many populations mix at their edges and some even migrate through areas occupied by other populations. Furthermore, the more complex models suffer from a "crisis of complexity"—more is really less. Adding layers of detail, each carrying its own set of assumptions, produces instability. The model's behavior becomes erratic, and conclusions drawn from it can be downright misleading.
Which of the following can be inferred from the passage about "models of the past"?
