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Direction: Read the following passage carefully and answer the questions given below it. 
In 2010, the National Aeronautics and Space Administration (NASA) discovered a new species of bacteria, called the GFAJ-1 strain, that for a while promised to change our understanding of how living things survive. Deep in the waters of Mono Lake in California, NASA scientists discovered a form of bacteria that seemed to use arsenic, plentiful in its habitat, to make DNA and proteins. Most life forms are made from six main building blocks: carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Arsenic is toxic to most known organisms, but the GFAJ-1 strain can tolerate high concentrations of arsenic, and initial studies suggested that it could even incorporate the chemical into its cells. Some scientists claimed that this discovery had opened new possibilities for life elsewhere in the universe, as the existence of such a microbe would show that organisms can exist in chemical environments that scientists may not have considered.
Q. According to the information in the passage, upon discovery of the GFAJ-1 strain, some scientists believed it was 
  • a)
    a water-based bacteria that had a high tolerance for toxins
  • b)
    one of the six building blocks of life
  • c)
    a form of arsenic that was toxic to most living organisms
  • d)
    a strain of bacteria that incorporated arsenic into its cells
  • e)
    a form of DNA that did not need phosphorus to grow
Correct answer is option 'D'. Can you explain this answer?
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Direction: Read the following passage carefully and answer the questio...
The correct answer to this Detail question is directly stated in the passage. GFAJ-1 can tolerate arsenic and "initial studies suggested that it could even incorporate the chemical into its cells.” Choices (A) and (D) both state that the GFAJ-1 strain is a form of bacteria. However, (A) states that it is a water-based bacteria, which is not supported by information in the passage. (D) states that the GFAJ-1 strain was believed to be a type of bacteria that incorporates arsenic into its cells, which (as noted above) is directly stated in the passage. This is the correct answer. Eliminate (B) because it states that the GFAJ-1 strain is a building block of life, not a bacteria strain that is made up of building blocks of life. Eliminate (C) because it states that the GFAJ-1 strain is a form of arsenic, not a bacteria strain that was thought to be arsenic based. Similarly, eliminate (E) because it states that the GFAJ-1 strain is a form of DNA, whereas the passage says that it seemed to develop DNA from arsenic.
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Directions: Answer the questions based on following reading passage.Until recently, many anthropologists assumed that the environment of what is now the southwestern United States shaped the social history and culture of the region’s indigenous peoples. Building on this assumption, archaeologists asserted that adverse environmental conditions and droughts were responsible for the disappearances and migrations of southwestern populations from many sites they once inhabited.However, such deterministic arguments fail to acknowledge that local environmental variability in the Southwest makes generalizing about that environment difficult. To examine the relationship between environmental variation and sociocultural change in the Western Pueblo region of central Arizona, which indigenous tribes have occupied continuously for at least 800 years, a research team recently reconstructed the climatic, vegetational, and erosional cycles of past centuries. The researchers found it impossible to provide a single, generally applicable characterization of environmental conditions for the region. Rather, they found that local areas experienced different patterns of rainfall, wind, and erosion, and that such conditions had prevailed in the Southwest for the last 1,400 years. Rainfall, for example, varied within and between local valley systems, so that even adjacent agricultural fields can produce significantly different yields.The researchers characterized episodes of variation in southwestern environments by frequency: low-frequency environmental processes occur in cycles longer than one human generation, which generally is considered to last about 25 years, and high frequency processes have shorter cycles. The researchers pointed out that low-frequency processes, such as fluctuations in stream flow and groundwater levels, would not usually be apparent to human populations. In contrast, high-frequency fluctuations such as seasonal temperature variations are observable and somewhat predictable, so that groups could have adapted their behaviors accordingly. When the researchers compared sequences of sociocultural change in the Western Pueblo region with episodes of low- and high-frequency environmental variation, however, they found no simple correlation between environmental process and sociocultural change or persistence.Although early Pueblo peoples did protect themselves against environmental risk and uncertainty, they responded variously on different occasions to similar patterns of high frequency climatic and environmental change. The researchers identified seven major adaptive responses, including increased mobility, relocation of permanent settlements, changes in subsistence foods, and reliance on trade with other groups. These findings suggest that groups’ adaptive choices depended on cultural and social as well as environmental factors and were flexible strategies rather than uncomplicated reactions to environmental change. Environmental conditions mattered, but they were rarely, if ever, sufficient to account for sociocultural persistence and change. Group size and composition, culture, contact with other groups, and individual choices and actions were— barring catastrophes such as floods or earthquakes—more significant for a population’s survival than were climate and environment.Q. Which of the following findings would most strongly support the assertion made by the archaeologists mentioned in line 3?

Directions: Answer the questions based on following reading passage.Until recently, many anthropologists assumed that the environment of what is now the southwestern United States shaped the social history and culture of the region’s indigenous peoples. Building on this assumption, archaeologists asserted that adverse environmental conditions and droughts were responsible for the disappearances and migrations of southwestern populations from many sites they once inhabited.However, such deterministic arguments fail to acknowledge that local environmental variability in the Southwest makes generalizing about that environment difficult. To examine the relationship between environmental variation and sociocultural change in the Western Pueblo region of central Arizona, which indigenous tribes have occupied continuously for at least 800 years, a research team recently reconstructed the climatic, vegetational, and erosional cycles of past centuries. The researchers found it impossible to provide a single, generally applicable characterization of environmental conditions for the region. Rather, they found that local areas experienced different patterns of rainfall, wind, and erosion, and that such conditions had prevailed in the Southwest for the last 1,400 years. Rainfall, for example, varied within and between local valley systems, so that even adjacent agricultural fields can produce significantly different yields.The researchers characterized episodes of variation in southwestern environments by frequency: low-frequency environmental processes occur in cycles longer than one human generation, which generally is considered to last about 25 years, and high frequency processes have shorter cycles. The researchers pointed out that low-frequency processes, such as fluctuations in stream flow and groundwater levels, would not usually be apparent to human populations. In contrast, high-frequency fluctuations such as seasonal temperature variations are observable and somewhat predictable, so that groups could have adapted their behaviors accordingly. When the researchers compared sequences of sociocultural change in the Western Pueblo region with episodes of low- and high-frequency environmental variation, however, they found no simple correlation between environmental process and sociocultural change or persistence.Although early Pueblo peoples did protect themselves against environmental risk and uncertainty, they responded variously on different occasions to similar patterns of high frequency climatic and environmental change. The researchers identified seven major adaptive responses, including increased mobility, relocation of permanent settlements, changes in subsistence foods, and reliance on trade with other groups. These findings suggest that groups’ adaptive choices depended on cultural and social as well as environmental factors and were flexible strategies rather than uncomplicated reactions to environmental change. Environmental conditions mattered, but they were rarely, if ever, sufficient to account for sociocultural persistence and change. Group size and composition, culture, contact with other groups, and individual choices and actions were— barring catastrophes such as floods or earthquakes—more significant for a population’s survival than were climate and environment.Q. It can be inferred from the passage that which of the following activities is NOT an example of a population responding to high-frequency environmental processes?

Directions: Answer the questions based on following reading passage.Until recently, many anthropologists assumed that the environment of what is now the southwestern United States shaped the social history and culture of the region’s indigenous peoples. Building on this assumption, archaeologists asserted that adverse environmental conditions and droughts were responsible for the disappearances and migrations of southwestern populations from many sites they once inhabited.However, such deterministic arguments fail to acknowledge that local environmental variability in the Southwest makes generalizing about that environment difficult. To examine the relationship between environmental variation and sociocultural change in the Western Pueblo region of central Arizona, which indigenous tribes have occupied continuously for at least 800 years, a research team recently reconstructed the climatic, vegetational, and erosional cycles of past centuries. The researchers found it impossible to provide a single, generally applicable characterization of environmental conditions for the region. Rather, they found that local areas experienced different patterns of rainfall, wind, and erosion, and that such conditions had prevailed in the Southwest for the last 1,400 years. Rainfall, for example, varied within and between local valley systems, so that even adjacent agricultural fields can produce significantly different yields.The researchers characterized episodes of variation in southwestern environments by frequency: low-frequency environmental processes occur in cycles longer than one human generation, which generally is considered to last about 25 years, and highfrequency processes have shorter cycles. The researchers pointed out that low-frequency processes, such as fluctuations in stream flow and groundwater levels, would not usually be apparent to human populations. In contrast, high-frequency fluctuations such as seasonal temperature variations are observable and somewhat predictable, so that groups could have adapted their behaviors accordingly. When the researchers compared sequences of sociocultural change in the Western Pueblo region with episodes of low- and high-frequency environmental variation, however, they found no simple correlation between environmental process and sociocultural change or persistence.Although early Pueblo peoples did protect themselves against environmental risk and uncertainty, they responded variously on different occasions to similar patterns of high frequency climatic and environmental change. The researchers identified seven major adaptive responses, including increased mobility, relocation of permanent settlements, changes in subsistence foods, and reliance on trade with other groups. These findings suggest that groups’ adaptive choices depended on cultural and social as well as environmental factors and were flexible strategies rather than uncomplicated reactions to environmental change. Environmental conditions mattered, but they were rarely, if ever, sufficient to account for sociocultural persistence and change. Group size and composition, culture, contact with other groups, and individual choices and actions were— barring catastrophes such as floods or earthquakes—more significant for a population’s survival than were climate and environment.Q. The fact that “adjacent agricultural fields can produce significantly different yields” (lines 16–17) is offered as evidence of the

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Direction: Read the following passage carefully and answer the questions given below it.In 2010, the National Aeronautics and Space Administration (NASA) discovered a new species of bacteria, called the GFAJ-1 strain, that for a while promised to change our understanding of how living things survive. Deep in the waters of Mono Lake in California, NASA scientists discovered a form of bacteria that seemed to use arsenic, plentiful in its habitat, to make DNA and proteins. Most life forms are made from six main building blocks: carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Arsenic is toxic to most known organisms, but the GFAJ-1 strain can tolerate high concentrations of arsenic, and initial studies suggested that it could even incorporate thechemical into its cells. Some scientists claimed that this discovery had opened new possibilities for life elsewhere in the universe, as the existence of such a microbe would show that organisms can exist in chemical environments that scientists may not have considered.Q.According to the information in the passage, upon discovery of the GFAJ-1 strain, some scientists believed it wasa)a water-based bacteria that had a high tolerance for toxinsb)one of the six building blocks of lifec)a form of arsenic that was toxic to most living organismsd)a strain of bacteria that incorporated arsenic into its cellse)a form of DNA that did not need phosphorus to growCorrect answer is option 'D'. Can you explain this answer?
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Direction: Read the following passage carefully and answer the questions given below it.In 2010, the National Aeronautics and Space Administration (NASA) discovered a new species of bacteria, called the GFAJ-1 strain, that for a while promised to change our understanding of how living things survive. Deep in the waters of Mono Lake in California, NASA scientists discovered a form of bacteria that seemed to use arsenic, plentiful in its habitat, to make DNA and proteins. Most life forms are made from six main building blocks: carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Arsenic is toxic to most known organisms, but the GFAJ-1 strain can tolerate high concentrations of arsenic, and initial studies suggested that it could even incorporate thechemical into its cells. Some scientists claimed that this discovery had opened new possibilities for life elsewhere in the universe, as the existence of such a microbe would show that organisms can exist in chemical environments that scientists may not have considered.Q.According to the information in the passage, upon discovery of the GFAJ-1 strain, some scientists believed it wasa)a water-based bacteria that had a high tolerance for toxinsb)one of the six building blocks of lifec)a form of arsenic that was toxic to most living organismsd)a strain of bacteria that incorporated arsenic into its cellse)a form of DNA that did not need phosphorus to growCorrect answer is option 'D'. Can you explain this answer? for GRE 2024 is part of GRE preparation. The Question and answers have been prepared according to the GRE exam syllabus. Information about Direction: Read the following passage carefully and answer the questions given below it.In 2010, the National Aeronautics and Space Administration (NASA) discovered a new species of bacteria, called the GFAJ-1 strain, that for a while promised to change our understanding of how living things survive. Deep in the waters of Mono Lake in California, NASA scientists discovered a form of bacteria that seemed to use arsenic, plentiful in its habitat, to make DNA and proteins. Most life forms are made from six main building blocks: carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Arsenic is toxic to most known organisms, but the GFAJ-1 strain can tolerate high concentrations of arsenic, and initial studies suggested that it could even incorporate thechemical into its cells. Some scientists claimed that this discovery had opened new possibilities for life elsewhere in the universe, as the existence of such a microbe would show that organisms can exist in chemical environments that scientists may not have considered.Q.According to the information in the passage, upon discovery of the GFAJ-1 strain, some scientists believed it wasa)a water-based bacteria that had a high tolerance for toxinsb)one of the six building blocks of lifec)a form of arsenic that was toxic to most living organismsd)a strain of bacteria that incorporated arsenic into its cellse)a form of DNA that did not need phosphorus to growCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for GRE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: Read the following passage carefully and answer the questions given below it.In 2010, the National Aeronautics and Space Administration (NASA) discovered a new species of bacteria, called the GFAJ-1 strain, that for a while promised to change our understanding of how living things survive. Deep in the waters of Mono Lake in California, NASA scientists discovered a form of bacteria that seemed to use arsenic, plentiful in its habitat, to make DNA and proteins. Most life forms are made from six main building blocks: carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Arsenic is toxic to most known organisms, but the GFAJ-1 strain can tolerate high concentrations of arsenic, and initial studies suggested that it could even incorporate thechemical into its cells. Some scientists claimed that this discovery had opened new possibilities for life elsewhere in the universe, as the existence of such a microbe would show that organisms can exist in chemical environments that scientists may not have considered.Q.According to the information in the passage, upon discovery of the GFAJ-1 strain, some scientists believed it wasa)a water-based bacteria that had a high tolerance for toxinsb)one of the six building blocks of lifec)a form of arsenic that was toxic to most living organismsd)a strain of bacteria that incorporated arsenic into its cellse)a form of DNA that did not need phosphorus to growCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Direction: Read the following passage carefully and answer the questions given below it.In 2010, the National Aeronautics and Space Administration (NASA) discovered a new species of bacteria, called the GFAJ-1 strain, that for a while promised to change our understanding of how living things survive. Deep in the waters of Mono Lake in California, NASA scientists discovered a form of bacteria that seemed to use arsenic, plentiful in its habitat, to make DNA and proteins. Most life forms are made from six main building blocks: carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Arsenic is toxic to most known organisms, but the GFAJ-1 strain can tolerate high concentrations of arsenic, and initial studies suggested that it could even incorporate thechemical into its cells. Some scientists claimed that this discovery had opened new possibilities for life elsewhere in the universe, as the existence of such a microbe would show that organisms can exist in chemical environments that scientists may not have considered.Q.According to the information in the passage, upon discovery of the GFAJ-1 strain, some scientists believed it wasa)a water-based bacteria that had a high tolerance for toxinsb)one of the six building blocks of lifec)a form of arsenic that was toxic to most living organismsd)a strain of bacteria that incorporated arsenic into its cellse)a form of DNA that did not need phosphorus to growCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for GRE. Download more important topics, notes, lectures and mock test series for GRE Exam by signing up for free.
Here you can find the meaning of Direction: Read the following passage carefully and answer the questions given below it.In 2010, the National Aeronautics and Space Administration (NASA) discovered a new species of bacteria, called the GFAJ-1 strain, that for a while promised to change our understanding of how living things survive. Deep in the waters of Mono Lake in California, NASA scientists discovered a form of bacteria that seemed to use arsenic, plentiful in its habitat, to make DNA and proteins. Most life forms are made from six main building blocks: carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Arsenic is toxic to most known organisms, but the GFAJ-1 strain can tolerate high concentrations of arsenic, and initial studies suggested that it could even incorporate thechemical into its cells. Some scientists claimed that this discovery had opened new possibilities for life elsewhere in the universe, as the existence of such a microbe would show that organisms can exist in chemical environments that scientists may not have considered.Q.According to the information in the passage, upon discovery of the GFAJ-1 strain, some scientists believed it wasa)a water-based bacteria that had a high tolerance for toxinsb)one of the six building blocks of lifec)a form of arsenic that was toxic to most living organismsd)a strain of bacteria that incorporated arsenic into its cellse)a form of DNA that did not need phosphorus to growCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Direction: Read the following passage carefully and answer the questions given below it.In 2010, the National Aeronautics and Space Administration (NASA) discovered a new species of bacteria, called the GFAJ-1 strain, that for a while promised to change our understanding of how living things survive. Deep in the waters of Mono Lake in California, NASA scientists discovered a form of bacteria that seemed to use arsenic, plentiful in its habitat, to make DNA and proteins. Most life forms are made from six main building blocks: carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Arsenic is toxic to most known organisms, but the GFAJ-1 strain can tolerate high concentrations of arsenic, and initial studies suggested that it could even incorporate thechemical into its cells. Some scientists claimed that this discovery had opened new possibilities for life elsewhere in the universe, as the existence of such a microbe would show that organisms can exist in chemical environments that scientists may not have considered.Q.According to the information in the passage, upon discovery of the GFAJ-1 strain, some scientists believed it wasa)a water-based bacteria that had a high tolerance for toxinsb)one of the six building blocks of lifec)a form of arsenic that was toxic to most living organismsd)a strain of bacteria that incorporated arsenic into its cellse)a form of DNA that did not need phosphorus to growCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Direction: Read the following passage carefully and answer the questions given below it.In 2010, the National Aeronautics and Space Administration (NASA) discovered a new species of bacteria, called the GFAJ-1 strain, that for a while promised to change our understanding of how living things survive. Deep in the waters of Mono Lake in California, NASA scientists discovered a form of bacteria that seemed to use arsenic, plentiful in its habitat, to make DNA and proteins. Most life forms are made from six main building blocks: carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Arsenic is toxic to most known organisms, but the GFAJ-1 strain can tolerate high concentrations of arsenic, and initial studies suggested that it could even incorporate thechemical into its cells. Some scientists claimed that this discovery had opened new possibilities for life elsewhere in the universe, as the existence of such a microbe would show that organisms can exist in chemical environments that scientists may not have considered.Q.According to the information in the passage, upon discovery of the GFAJ-1 strain, some scientists believed it wasa)a water-based bacteria that had a high tolerance for toxinsb)one of the six building blocks of lifec)a form of arsenic that was toxic to most living organismsd)a strain of bacteria that incorporated arsenic into its cellse)a form of DNA that did not need phosphorus to growCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Direction: Read the following passage carefully and answer the questions given below it.In 2010, the National Aeronautics and Space Administration (NASA) discovered a new species of bacteria, called the GFAJ-1 strain, that for a while promised to change our understanding of how living things survive. Deep in the waters of Mono Lake in California, NASA scientists discovered a form of bacteria that seemed to use arsenic, plentiful in its habitat, to make DNA and proteins. Most life forms are made from six main building blocks: carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Arsenic is toxic to most known organisms, but the GFAJ-1 strain can tolerate high concentrations of arsenic, and initial studies suggested that it could even incorporate thechemical into its cells. Some scientists claimed that this discovery had opened new possibilities for life elsewhere in the universe, as the existence of such a microbe would show that organisms can exist in chemical environments that scientists may not have considered.Q.According to the information in the passage, upon discovery of the GFAJ-1 strain, some scientists believed it wasa)a water-based bacteria that had a high tolerance for toxinsb)one of the six building blocks of lifec)a form of arsenic that was toxic to most living organismsd)a strain of bacteria that incorporated arsenic into its cellse)a form of DNA that did not need phosphorus to growCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Direction: Read the following passage carefully and answer the questions given below it.In 2010, the National Aeronautics and Space Administration (NASA) discovered a new species of bacteria, called the GFAJ-1 strain, that for a while promised to change our understanding of how living things survive. Deep in the waters of Mono Lake in California, NASA scientists discovered a form of bacteria that seemed to use arsenic, plentiful in its habitat, to make DNA and proteins. Most life forms are made from six main building blocks: carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Arsenic is toxic to most known organisms, but the GFAJ-1 strain can tolerate high concentrations of arsenic, and initial studies suggested that it could even incorporate thechemical into its cells. Some scientists claimed that this discovery had opened new possibilities for life elsewhere in the universe, as the existence of such a microbe would show that organisms can exist in chemical environments that scientists may not have considered.Q.According to the information in the passage, upon discovery of the GFAJ-1 strain, some scientists believed it wasa)a water-based bacteria that had a high tolerance for toxinsb)one of the six building blocks of lifec)a form of arsenic that was toxic to most living organismsd)a strain of bacteria that incorporated arsenic into its cellse)a form of DNA that did not need phosphorus to growCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice GRE tests.
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