October 2018 SAT essay sample: "Protect Our Bats"

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October 2018 SAT test essay sample: "Protect Our Bats"

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October 2018 SAT Test

The gradual disappearance of species is bound to break the ecological balance and finally pose a threat on human beings. In response to the decreasing number of bats, the three scientists, in their passage "Protect Our Bats", analyze two chief causes and indicate potential risks for agriculture and human health,thereby advocating protecting bats. In the scientific discourse, the authors make full use of data and studies, as well as employ concession and refutation.

In the beginning, the authors come straight to the argument that both disease and wind turbines result in the missing native bats, which further threatens agriculture and human health. Here the declarative introduction comes into readers' views without any lead in or hook. They explicitly empower readers to figure out what the main structure and purpose are. Then, the two causes are separately interpreted with the help of evidence. For one thing, the source of white-nose syndrome is traced to Europe, carried by an explorer. Because native bats in North America are not immune to the cold-loving fungus during hibernation, they have to use up energies when awake. Unfortunately, the failure to replenish energies leads to their death. Such a sequence of hard facts explains clearly why cave-dwelling bats get infectious, and help the smooth transition to "catastrophic consequences". Specifically, a study is cited to show the startling percentage,such as 70%, 90% and 99%. Even the long-eared bats have been classified as an endangered species. What's worse, there is no sign of any recovery in bats' disappearance and the disease has spread to other intact areas. Therefore, the reference to study reveals the deadly impacts on cave-dwelling bats and paints a gloomy outlook for their future existence. For another, tree-dwelling bats escape the fatal disease, though. They have been endangered by another threat—win farms. The authors continue employing study to acknowledge this direct conflict. Between 600000 and 900000 tree-dwelling bats die from wind turbines,particularly when they migrate seasonally or they hunt insects at night. Here the authors repeat the declining number of bats, but foreshadowing "we can reduce the turbine threat significantly". In other words, readers can be aware of the optimistic outlook for tree-dwelling ones.

In the middle stage, the authors turn to "the devastating consequences for agriculture and human health". They first admit that the disappearance of bats is beyond reach by employing data in order for the value of bats to be recognized. Average bat is able to eat 1000 mosquitos, preventing mosquito-borne diseases; a colony wipes out 33 million root worms; and the Mexican free-tailed bats feed on 250 tons of insects every summer night. It is widely acknowledged that bats are the natural enemies for pests, but readers often take their contributions for granted and even consider them inessential.Such credible data will reshape bats' great values and numerical evidence is more straightforward and transparent. Further, readers are concerned about monetary values, so the authors convert the number insects consumed into funds on pest control. The monetary evidence, such as "$75000", "$6million" and "$3.7billion", directly indicates bats' economic values; and readers in turn are likely to feel surprised that bats are so significant in pest control. It is anticipated that genetic engineering replace bats to protect crops from insects. After admitting this replacement, the authors defend bats by making known the weaknesses of "this effective way". Pests have been resistant to some chemical insecticides; and the wide use of chemicals threatens human health to some degree. In contrast, bats parallel insect for many years, so they can eliminate pests at no expense of agriculture and human health. This refutation legitimately dismisses the concession and keeps persuading readers to recognize the indispensable role bats are playing.

Before ending their argument, the authors starts with how to "reduce the mortality caused by wind farms" which responds naturally to the claim that "we can reduce the turbine threat". Rather than just speak with empty talk, they introduce aerodynamics to relocate wind farms, thereby minimizing the harms on flying bats. Meanwhile, a study shows that "turbine-related deaths could be reduced by44 to 93 percent" and "the effect on power output would be negligible."Overall, the scientific explanation, followed by study, proves the relocation is practical and the following effects are also very desirable.

Through the effective use if rhetorical tools and the mindful arrangement of this essay,the authors persuade the audience that the main idea.

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