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May 0312:30 AM EDT
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Learn how Kamakshi achieved a GMAT 675 with an impressive 96th %ile in Data Insights. Discover the unique methods and exam strategies that helped her excel in DI along with other sections for a balanced and high score.
Updated on: 12 Jan 2020, 08:17
Originally posted by Raxit85 on 12 Jan 2020, 07:59.
Last edited by Sajjad1994 on 12 Jan 2020, 08:17, edited 2 times in total.
Last edited by Sajjad1994 on 12 Jan 2020, 08:17, edited 2 times in total.
Edited.
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Question 1
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
62% (02:44) correct
38%
(02:20) wrong
based on 66
sessions
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Though first synthesized in 1874, DDT's incredible potential as an insecticide was not fully understood until 1939. It became an essential tool for the allied powers in World War II, who used it extensively for vector disease control—to kill the insects that spread typhus and malaria, nearly eliminating these diseases in some areas. It was only after WWII that DDT began to gain popularity as an agricultural pesticide. While a fair amount of apprehension about its possible environmental hazards existed as early as the 1940s, these concerns would not rise to the level of a national debate until twenty years later when early environmentalist Rachael Carson published her highly influential book Silent Spring. The book claimed that DDT was a persistent toxin—one that would remain in the atmosphere for many years after its use—and that it could cause several types of cancer in humans as well as problems associated with decreased biodiversity and habitat destruction, particularly for birds. These findings prompted an investigation by President Kennedy and eventually led to a nation-wide ban of the chemical in 1972.
Following the Stockholm Convention of 2004, DDT is now restricted from agricultural use but is still employed for disease vector control in much of the world. Many epidemiologists have observed that the ban on agricultural DDT has had the unexpected consequence of increasing its effectiveness for disease vector control. It has done so simply by decreasing the overall volume of DDT in most environments. The most persistent obstacle facing those using DDT for disease vector control is the development of resistance among target insect populations.
Following the Stockholm Convention of 2004, DDT is now restricted from agricultural use but is still employed for disease vector control in much of the world. Many epidemiologists have observed that the ban on agricultural DDT has had the unexpected consequence of increasing its effectiveness for disease vector control. It has done so simply by decreasing the overall volume of DDT in most environments. The most persistent obstacle facing those using DDT for disease vector control is the development of resistance among target insect populations.
According to the passage, which of the following was an almost entirely overlooked consequence of agricultural use of DDT?
(A) decreased biodiversity, particularly with regard to birds
(B) increased rates of several cancers in humans, particularly in agricultural communities
(C) decreased effectiveness of DDT as a disease vector control agent
(D) increased rates of malaria and other insect-borne diseases
(E) destruction of animal habitats essential to the overall ecosystem
(A) decreased biodiversity, particularly with regard to birds
(B) increased rates of several cancers in humans, particularly in agricultural communities
(C) decreased effectiveness of DDT as a disease vector control agent
(D) increased rates of malaria and other insect-borne diseases
(E) destruction of animal habitats essential to the overall ecosystem
16 Aug 2022, 07:02
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In the question, we have been asked about the entirely overlooked consequence of agricultural use of DDT, Please note the word Agricultural use of DDT.
But the last line of the passage says "The most persistent obstacle facing those using DDT for disease vector control is the development of resistance among target insect populations.". Clearly, it is talking about the DDT for disease vector control. Then, how we can relate the agricultural use of DDT to the decreased effectiveness of DDT as a disease vector control agent? Aren't both independent?
According to the passage, which of the following was an almost entirely overlooked consequence of agricultural use of DDT?
(A) decreased biodiversity, particularly with regard to birds
(B) increased rates of several cancers in humans, particularly in agricultural communities
(C) decreased effectiveness of DDT as a disease vector control agent
(D) increased rates of malaria and other insect-borne diseases
(E) destruction of animal habitats essential to the overall ecosystem
But the last line of the passage says "The most persistent obstacle facing those using DDT for disease vector control is the development of resistance among target insect populations.". Clearly, it is talking about the DDT for disease vector control. Then, how we can relate the agricultural use of DDT to the decreased effectiveness of DDT as a disease vector control agent? Aren't both independent?
According to the passage, which of the following was an almost entirely overlooked consequence of agricultural use of DDT?
(A) decreased biodiversity, particularly with regard to birds
(B) increased rates of several cancers in humans, particularly in agricultural communities
(C) decreased effectiveness of DDT as a disease vector control agent
(D) increased rates of malaria and other insect-borne diseases
(E) destruction of animal habitats essential to the overall ecosystem
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