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OG18 OG19 OG20 OG2022
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Beginning in 1966 all new cars sold in Morodia were required to have safety belts and power steering. Previously, most cars in Morodia were without these features. Safety belts help to prevent injuries in collisions, and power steering helps to avoid collisions in the first place. But even though in 1966 one-seventh of the cars in Morodia were replaced with new cars, the number of car collisions and collision-related injuries did not decline.
Which of the following, if true about Morodia, most helps to explain why the number of collisions and collision-related injuries in Morodia failed to decline in 1966?
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OG18 OG19 OG20 OG2022
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Proponents of the recently introduced tax on sales of new luxury boats had argued that a tax of this sort would be an equitable way to increase government revenue because the admittedly heavy tax burden would fall only on wealthy people and neither they nor anyone else would suffer any economic hardship. In fact, however, 20 percent of the workers employed by manufacturers of luxury boats have lost their jobs as a direct result of this tax.The information given, if true, most strongly supports which of the following?
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OG18 OG19 OG20 OG2022
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Last year Comfort Airlines had twice as many delayed flights as the year before, but the number of complaints from passengers about delayed flights went up three times. It is unlikely that this disproportionate increase in complaints was rooted in an increase in overall dissatisfaction with the service Comfort Airlines provides, since the airline made a special effort to improve other aspects of its service last year.Which of the following, if true, most helps to explain the disproportionate increase in customer complaints?
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Resin is a plant secretion that hardens when exposed to air; fossilized resin is called amber. Although Pliny in the first century recognized that amber was produced from "marrow discharged by trees,'' amber has been widely misunderstood to be a semiprecious gem and has even been described in mineralogy textbooks. Confusion also persists surrounding the term ''resin,''which was defined before rigorous chemical analyses were available. Resin is often confused with gum, a substance [line:11]produced in plants in response to bacterial infections,[/line:11] and with sap, an aqueous solution transported through certain plant tissues. Resin differs from both gum and sap in that scientists have not determined a physiological function for resin. In the 1950s, entomologists posited that resin may function to repel or attract insects. Fraenkel conjectured that plants initially produced resin in nonspecific chemical responses to insect attack and that, over time, plants evolved that produced resin with specific repellent effect. But some insect species, he noted, might overcome the repellent effects, actually becoming attracted to the resin. This might induce the insects to feed on those plants or aid them in securing a breeding site. Later researchers suggested that resin mediates the complex interdependence, or “coevolution,” of plants and insects over time. Such ideas led to the development of the specialized discipline of chemical ecology, which is concerned with the role of plant chemicals in interactions with other organisms and with the evolution and ecology of plant antiherbivore chemistry (plants' chemical defenses against attack by herbivores such as insects).
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OG18 OG19 OG20 OG2022
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The author of the passage refers to Pliny most probably in order to
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OG18 OG19 OG20 OG2022
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According to the passage, present-day columnar cacti in the Sonoran Desert differ from their close relatives in southern Mexico in that the Sonoran cacti
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Conodonts, the spiky phosphatic remains (bones and teeth composed of calcium phosphate) of tiny marine animals that probably appeared about 520 million years ago, were once among the most controversial of fossils. Both the nature of the organism to which the remains belonged and the function of the remains were unknown. However, since the 1981 discovery of fossils preserving not just the phosphatic elements but also other remains of the tiny soft-bodied animals (also called conodonts) that bore them, scientists' reconstructions of the animals' anatomy have had important implications for hypotheses concerning the development of the vertebrate skeleton.The vertebrate skeleton had traditionally been regarded as a defensive development, champions of this view postulating that it was only with the much later evolution of jaws that vertebrates became predators. The first vertebrates, which were soft bodied, would have been easy prey for numerous invertebrate carnivores, especially if these early vertebrates were sedentary suspension feeders. Thus, traditionalists argued, these animals developed coverings of bony scales or plates, and teeth were secondary features, adapted from the protective bony scales. Indeed, external skeletons of this type are common among the well-known fossils of ostracoderms, jawless vertebrates that existed from approximately 500 to 400 million years ago. However, other paleontologists argued that many of the definitive characteristics of vertebrates, such as paired eyes and muscular and skeletal adaptations for active life, would not have evolved unless the first vertebrates were predatory. Teeth were more primitive than external armor according to this view, and the earliest vertebrates were predators.The stiffening notochord along the back of the body, V-shaped muscle blocks along the sides, and posterior tail fins help to identify conodonts as among the most primitive of vertebrates. The lack of any mineralized structures apart from the elements in the mouth indicates that conodonts were more primitive than the armored jawless fishes such as the ostracoderms. It now appears that the hard parts that first evolved in the mouth of an animal improved its efficiency as a predator, and that aggression rather than protection was the driving force behind the origin of the vertebrate skeleton.
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OG18 OG19 OG20 OG2022
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According to the passage, the anatomical evidence provided by the preserved soft bodies of conodonts led scientists to conclude that
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OG18 OG19 OG20 OG2022
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[line:16:enable]The discovery of which of the following would call into question the conclusion mentioned in line 16 ?
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Manhattan
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If a and b are positive integers and$$ x = 4^{ a} and y = 9^{ b}$$, which of the following is a possible units digit of xy?
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Manhattan
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If n is a nonzero integer, is $$x^n < 1$$?(1) $$x \gt 1$$(2) $$n \gt 0$$
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Manhattan
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If$$ 9^{2x + 1} = 27^{2}$$, then x =
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Manhattan
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The perimeter of a rectangular yard is completely surrounded by a fence that measures 40 meters. What is the length of the yard if the area of the yard is 64 meters squared?
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Manhattan
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If $$3^{2n} = (\frac{1}{9})^{n+2}$$, what is the value of n?
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Manhattan
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Set A contains three different positive odd integers and two different positive even integers; set B contains two different positive odd integers and three different positive even integers. If one integer from set A and one integer from set B are chosen at random, what is the probability that the product of the chosen integers is even?
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Manhattan
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If x is a positive integer, is x even?(1) $$x^4$$ is even(2) $$4x$$ is even
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Manhattan
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If r and q are integers, what is the value of $$（5^r）（3^{q+1})$$?(1) $$(5^r)(3^q) = 729$$(2) $$r + q = 6$$
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Manhattan
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What is x?(1) $$x^2 + 3x + 2 = 0$$(2) $$x \lt 0$$
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Manhattan
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If ABCD is a trapezoid, where AB is parallel to CD, what is the area of ABCD?(1) $$2(AB) + CD = 12$$(2) The height of the trapezoid is 5 inches
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Manhattan
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Is x positive?(1) $$(x – 3)^2 > 0$$(2) $$x^3 – 1 > 0$$
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