Comprehension Test Questions and Answers Practice Question and Answer
8 Q:Directions: Read the following passage carefully and answer the questions given below it. Certain words have been printed in bold to help you locate them, while answering some of the questions.
Among those suffering from the global recession are millions of workers who are not even included in the official statistics : urban recyclers – the trash pickers, sorters, traders and reprocesses who extricate paper, cardboard and plastics from garbage heaps and prepare them for reuse. Their work is both unrecorded and largely unrecognized, even though in some parts of the World they handle as much as 20% of all waste.
The World’s 15 million informal recyclers clean up cities, prevent some trash from ending in landfills and thus, reduce climate change by saving energy on waste disposal techniques like incineration. In the developed countries they are the preferred ones since they recycle waste much more cheaply and efficiently than governments or private corporations can. In the developing World, on the other hand, they provide the only recycling services except for a few big cities. But as recession hits the markets Worldwide, the price of scrap metal, paper and plastic has also fallen. Recyclers throughout the World are experiencing a sharp drop in income. Trash pickers and scrap dealers saw a decline of as much as 80% in the price of scrap from October 2007 to October 2009. In some countries scrap dealers have shuttered so quickly that researchers at the Solid Waste Management Association didn’t have a chance to record their losses. In Delhi, some 80% of families in the informal recycling business surveyed by an organization said they had cut back on “luxury foods,” which they defined as fruit, milk and meat. About 41% had stopped buying milk for their children. By this summer, most of those children, already malnourished, hadn’t had a glass of milk in nine months. Many of these children have also cut down on hours spent in school to work alongside their parents. Families have liquidated their most valuable assets – primarily copper from electrical wires – and have stopped sending remittances back to their rural villages. Many have also sold their emergency stores of grain. Their misery is not as familiar as that of the laid-off workers of big name but imploding, service sector corporation, but it is often more tragic. Few countries have adopted emergency measures to help trash pickers. Brazil, for one, is providing recyclers, or “catadores,” with cheaper food, both through arrangements with local farmers and by offering food subsidies. Other countries, with the support of non-governmental organizations and donor agencies are following Brazil’s example. Unfortunately, most trash pickers operate outside official notice and end up falling through the cracks of programmes like these. In the long run, though, these invisible workers will remain especially vulnerable to economic slowdowns unless they are integrated into the formal business sector, where they can have insurance and reliable wages. This is not hard to accomplish. Informal junk shops should have to apply for licences, and governments should create or expand doorstep waste collection programmes to employ trash pickers. Instead of sorting through haphazard trash heaps and landfills, the pickers would have access to the cleaner scrap that comes from households.
The need of the hour, however, is a more immediate solution. An efficient but temporary solution would be for governments where they’d have to pay a small subsidy to waste dealers so they could purchase scrap from trash pickers at about 20% above the current price. This increase, if well advertised and broadky utilized, would bring recyclers a higher price and eventually bring them back from the brink. Trash pickers make our cities healthier and more liveable. We all stand to gain by making sure that the work of recycling remains sustainable for years to come.
What does the author mean by “Their misery is not as familiar as that of the laid-off workers of big-name but imploding, service sector corporation” as given in the passage?
744 0618a12030d7da340ac2bd8b9
618a12030d7da340ac2bd8b9Among those suffering from the global recession are millions of workers who are not even included in the official statistics : urban recyclers – the trash pickers, sorters, traders and reprocesses who extricate paper, cardboard and plastics from garbage heaps and prepare them for reuse. Their work is both unrecorded and largely unrecognized, even though in some parts of the World they handle as much as 20% of all waste.
The World’s 15 million informal recyclers clean up cities, prevent some trash from ending in landfills and thus, reduce climate change by saving energy on waste disposal techniques like incineration. In the developed countries they are the preferred ones since they recycle waste much more cheaply and efficiently than governments or private corporations can. In the developing World, on the other hand, they provide the only recycling services except for a few big cities. But as recession hits the markets Worldwide, the price of scrap metal, paper and plastic has also fallen. Recyclers throughout the World are experiencing a sharp drop in income. Trash pickers and scrap dealers saw a decline of as much as 80% in the price of scrap from October 2007 to October 2009. In some countries scrap dealers have shuttered so quickly that researchers at the Solid Waste Management Association didn’t have a chance to record their losses. In Delhi, some 80% of families in the informal recycling business surveyed by an organization said they had cut back on “luxury foods,” which they defined as fruit, milk and meat. About 41% had stopped buying milk for their children. By this summer, most of those children, already malnourished, hadn’t had a glass of milk in nine months. Many of these children have also cut down on hours spent in school to work alongside their parents. Families have liquidated their most valuable assets – primarily copper from electrical wires – and have stopped sending remittances back to their rural villages. Many have also sold their emergency stores of grain. Their misery is not as familiar as that of the laid-off workers of big name but imploding, service sector corporation, but it is often more tragic. Few countries have adopted emergency measures to help trash pickers. Brazil, for one, is providing recyclers, or “catadores,” with cheaper food, both through arrangements with local farmers and by offering food subsidies. Other countries, with the support of non-governmental organizations and donor agencies are following Brazil’s example. Unfortunately, most trash pickers operate outside official notice and end up falling through the cracks of programmes like these. In the long run, though, these invisible workers will remain especially vulnerable to economic slowdowns unless they are integrated into the formal business sector, where they can have insurance and reliable wages. This is not hard to accomplish. Informal junk shops should have to apply for licences, and governments should create or expand doorstep waste collection programmes to employ trash pickers. Instead of sorting through haphazard trash heaps and landfills, the pickers would have access to the cleaner scrap that comes from households.
- 1The effect of recession on the famous organizations is clearly noticed, whereas the plight of informal recyclers is neglected.false
- 2Big name corporations are often hesitant to help the relatively smaller such as that of the informal recyclers.false
- 3The big name private recyclers have been getting the government help, whereas the smaller ones are not.true
- 4The misery of the informal recyclers has been kept a secret by the governmentfalse
- 5None of thesefalse
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Answer : 3. "The big name private recyclers have been getting the government help, whereas the smaller ones are not."
Q:Directions: Read the following passage carefully and answer the questions given below it. Certain words have been printed in bold to help you locate them, while answering some of the questions.
Among those suffering from the global recession are millions of workers who are not even included in the official statistics : urban recyclers – the trash pickers, sorters, traders and reprocesses who extricate paper, cardboard and plastics from garbage heaps and prepare them for reuse. Their work is both unrecorded and largely unrecognized, even though in some parts of the World they handle as much as 20% of all waste.
The World’s 15 million informal recyclers clean up cities, prevent some trash from ending in landfills and thus, reduce climate change by saving energy on waste disposal techniques like incineration. In the developed countries they are the preferred ones since they recycle waste much more cheaply and efficiently than governments or private corporations can. In the developing World, on the other hand, they provide the only recycling services except for a few big cities. But as recession hits the markets Worldwide, the price of scrap metal, paper and plastic has also fallen. Recyclers throughout the World are experiencing a sharp drop in income. Trash pickers and scrap dealers saw a decline of as much as 80% in the price of scrap from October 2007 to October 2009. In some countries scrap dealers have shuttered so quickly that researchers at the Solid Waste Management Association didn’t have a chance to record their losses. In Delhi, some 80% of families in the informal recycling business surveyed by an organization said they had cut back on “luxury foods,” which they defined as fruit, milk and meat. About 41% had stopped buying milk for their children. By this summer, most of those children, already malnourished, hadn’t had a glass of milk in nine months. Many of these children have also cut down on hours spent in school to work alongside their parents. Families have liquidated their most valuable assets – primarily copper from electrical wires – and have stopped sending remittances back to their rural villages. Many have also sold their emergency stores of grain. Their misery is not as familiar as that of the laid-off workers of big name but imploding, service sector corporation, but it is often more tragic. Few countries have adopted emergency measures to help trash pickers. Brazil, for one, is providing recyclers, or “catadores,” with cheaper food, both through arrangements with local farmers and by offering food subsidies. Other countries, with the support of non-governmental organizations and donor agencies are following Brazil’s example. Unfortunately, most trash pickers operate outside official notice and end up falling through the cracks of programmes like these. In the long run, though, these invisible workers will remain especially vulnerable to economic slowdowns unless they are integrated into the formal business sector, where they can have insurance and reliable wages. This is not hard to accomplish. Informal junk shops should have to apply for licences, and governments should create or expand doorstep waste collection programmes to employ trash pickers. Instead of sorting through haphazard trash heaps and landfills, the pickers would have access to the cleaner scrap that comes from households.
The need of the hour, however, is a more immediate solution. An efficient but temporary solution would be for governments where they’d have to pay a small subsidy to waste dealers so they could purchase scrap from trash pickers at about 20% above the current price. This increase, if well advertised and broadky utilized, would bring recyclers a higher price and eventually bring them back from the brink. Trash pickers make our cities healthier and more liveable. We all stand to gain by making sure that the work of recycling remains sustainable for years to come.
Which of the following has not been an effect of the losses observed in the informal waste recycling?
690 0618a0bee9236c01fbea869f7
618a0bee9236c01fbea869f7Among those suffering from the global recession are millions of workers who are not even included in the official statistics : urban recyclers – the trash pickers, sorters, traders and reprocesses who extricate paper, cardboard and plastics from garbage heaps and prepare them for reuse. Their work is both unrecorded and largely unrecognized, even though in some parts of the World they handle as much as 20% of all waste.
The World’s 15 million informal recyclers clean up cities, prevent some trash from ending in landfills and thus, reduce climate change by saving energy on waste disposal techniques like incineration. In the developed countries they are the preferred ones since they recycle waste much more cheaply and efficiently than governments or private corporations can. In the developing World, on the other hand, they provide the only recycling services except for a few big cities. But as recession hits the markets Worldwide, the price of scrap metal, paper and plastic has also fallen. Recyclers throughout the World are experiencing a sharp drop in income. Trash pickers and scrap dealers saw a decline of as much as 80% in the price of scrap from October 2007 to October 2009. In some countries scrap dealers have shuttered so quickly that researchers at the Solid Waste Management Association didn’t have a chance to record their losses. In Delhi, some 80% of families in the informal recycling business surveyed by an organization said they had cut back on “luxury foods,” which they defined as fruit, milk and meat. About 41% had stopped buying milk for their children. By this summer, most of those children, already malnourished, hadn’t had a glass of milk in nine months. Many of these children have also cut down on hours spent in school to work alongside their parents. Families have liquidated their most valuable assets – primarily copper from electrical wires – and have stopped sending remittances back to their rural villages. Many have also sold their emergency stores of grain. Their misery is not as familiar as that of the laid-off workers of big name but imploding, service sector corporation, but it is often more tragic. Few countries have adopted emergency measures to help trash pickers. Brazil, for one, is providing recyclers, or “catadores,” with cheaper food, both through arrangements with local farmers and by offering food subsidies. Other countries, with the support of non-governmental organizations and donor agencies are following Brazil’s example. Unfortunately, most trash pickers operate outside official notice and end up falling through the cracks of programmes like these. In the long run, though, these invisible workers will remain especially vulnerable to economic slowdowns unless they are integrated into the formal business sector, where they can have insurance and reliable wages. This is not hard to accomplish. Informal junk shops should have to apply for licences, and governments should create or expand doorstep waste collection programmes to employ trash pickers. Instead of sorting through haphazard trash heaps and landfills, the pickers would have access to the cleaner scrap that comes from households.
- 1To help their families, the children of the recyclers have started working thus compromising on their educationfalse
- 2Many scrap dealers have discontinued their businessesfalse
- 3The government in many countries has derecognized scrap dealers in view of their unprofitable business.true
- 4Governments in many countries had to take emergency steps to help the recyclers deal with the crisisfalse
- 5None of thesefalse
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Answer : 3. "The government in many countries has derecognized scrap dealers in view of their unprofitable business."
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- Workspace
- SingleChoice
Answer : 4. "Only A and C"
Q:Directions :Read the given passage carefully and answer the following questions. Certain parts have been highlighted to help answer the questions.
Every year, around one million people die of mosquitoborne diseases according to the World Health Organization (WHO). This is why mosquitoes are considered one of the deadliest living creatures on the planet — not because they are lethal themselves, but because many of the viruses and parasites they transmit are
In the absence of an effective vaccine for dengue fever, Zika fever, chikungunya and other mosquito-borne diseases, researchers have developed genetic strategies to reduce mosquito populations. One such strategy involves the release into the wild of genetically modified (GM) mosquitoes that express a lethal gene — a strategy believed to have little impact on the overall DNA of wild populations of mosquitoes
The transfer of new genes from GM organisms to wild or domesticated non-GM populations is a key criticism of GM crops like soybean and corn. There are concerns that the introduction of GM genes into non-target species could have negative consequences for both human and environmental health.
Oxitec, a company that spun out of research at Oxford University in the early 2000s, developed and trademarked GM Friendly™ mosquitoes (also known as strain OX513A of Aedes aegypti). These male GM mosquitoes have what the company describes as a “self-limiting” gene, which means that when these so-called friendly mosquitoes’ mate, their offspring inherit the self-limiting gene which is supposed to prevent them surviving into adulthood.
In theory, when these mosquitoes are released in high numbers, a dramatic reduction in the mosquito population should follow. According to research published by Oxitec researchers in 2015, field trials involving recurring releases of Friendly™ mosquitoes demonstrated a reduction of nearly 95 per cent of target populations in Brazil. In these field trials, experiments were not performed to assess whether GM mosquitoes might persist in the wild.
A recent study from the Powell lab at Yale University has since confirmed that some of the offspring of the GM mosquitoes didn’t succumb to the self-limiting lethal gene and survived to adulthood. They were able to breed with native mosquitoes and thereby introduce some of their genes into the wild population
Meanwhile, the impact of mosquitoes carrying these new genes remains largely unknown. One significant worry is that a new breed of mosquito might emerge that is more difficult to control. These new genes could also potentially alter evolutionary pressures on viruses carried by mosquitoes, like dengue fever, in unpredictable ways. This includes potentially increasing their virulence or changing their host-insect interactions. These are hypothetical risks that have been raised by scientists, and reflect the need for further study.
Which of the statements can be considered as true with respect to the passage given?
745 0617f94b241b20233b976e84f
617f94b241b20233b976e84fEvery year, around one million people die of mosquitoborne diseases according to the World Health Organization (WHO). This is why mosquitoes are considered one of the deadliest living creatures on the planet — not because they are lethal themselves, but because many of the viruses and parasites they transmit are
In the absence of an effective vaccine for dengue fever, Zika fever, chikungunya and other mosquito-borne diseases, researchers have developed genetic strategies to reduce mosquito populations. One such strategy involves the release into the wild of genetically modified (GM) mosquitoes that express a lethal gene — a strategy believed to have little impact on the overall DNA of wild populations of mosquitoes
The transfer of new genes from GM organisms to wild or domesticated non-GM populations is a key criticism of GM crops like soybean and corn. There are concerns that the introduction of GM genes into non-target species could have negative consequences for both human and environmental health.
Oxitec, a company that spun out of research at Oxford University in the early 2000s, developed and trademarked GM Friendly™ mosquitoes (also known as strain OX513A of Aedes aegypti). These male GM mosquitoes have what the company describes as a “self-limiting” gene, which means that when these so-called friendly mosquitoes’ mate, their offspring inherit the self-limiting gene which is supposed to prevent them surviving into adulthood.
In theory, when these mosquitoes are released in high numbers, a dramatic reduction in the mosquito population should follow. According to research published by Oxitec researchers in 2015, field trials involving recurring releases of Friendly™ mosquitoes demonstrated a reduction of nearly 95 per cent of target populations in Brazil. In these field trials, experiments were not performed to assess whether GM mosquitoes might persist in the wild.
A recent study from the Powell lab at Yale University has since confirmed that some of the offspring of the GM mosquitoes didn’t succumb to the self-limiting lethal gene and survived to adulthood. They were able to breed with native mosquitoes and thereby introduce some of their genes into the wild population
Meanwhile, the impact of mosquitoes carrying these new genes remains largely unknown. One significant worry is that a new breed of mosquito might emerge that is more difficult to control. These new genes could also potentially alter evolutionary pressures on viruses carried by mosquitoes, like dengue fever, in unpredictable ways. This includes potentially increasing their virulence or changing their host-insect interactions. These are hypothetical risks that have been raised by scientists, and reflect the need for further study.
- 1GM mosquitoes are able to introduce some of their genes into the wild population.false
- 2Mosquitoes having GM genes have been thoroughly researched upon.false
- 3Oxitec released its friendly mosquitoes in Brazilfalse
- 4(a) and (c)true
- 5All of the abovefalse
- Show Answer
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- SingleChoice
Answer : 4. "(a) and (c) "
- Show Answer
- Workspace
- SingleChoice
Answer : 1. "fatal "
Q:Directions :Read the given passage carefully and answer the following questions. Certain parts have been highlighted to help answer the questions.
Every year, around one million people die of mosquitoborne diseases according to the World Health Organization (WHO). This is why mosquitoes are considered one of the deadliest living creatures on the planet — not because they are lethal themselves, but because many of the viruses and parasites they transmit are
In the absence of an effective vaccine for dengue fever, Zika fever, chikungunya and other mosquito-borne diseases, researchers have developed genetic strategies to reduce mosquito populations. One such strategy involves the release into the wild of genetically modified (GM) mosquitoes that express a lethal gene — a strategy believed to have little impact on the overall DNA of wild populations of mosquitoes
The transfer of new genes from GM organisms to wild or domesticated non-GM populations is a key criticism of GM crops like soybean and corn. There are concerns that the introduction of GM genes into non-target species could have negative consequences for both human and environmental health.
Oxitec, a company that spun out of research at Oxford University in the early 2000s, developed and trademarked GM Friendly™ mosquitoes (also known as strain OX513A of Aedes aegypti). These male GM mosquitoes have what the company describes as a “self-limiting” gene, which means that when these so-called friendly mosquitoes’ mate, their offspring inherit the self-limiting gene which is supposed to prevent them surviving into adulthood.
In theory, when these mosquitoes are released in high numbers, a dramatic reduction in the mosquito population should follow. According to research published by Oxitec researchers in 2015, field trials involving recurring releases of Friendly™ mosquitoes demonstrated a reduction of nearly 95 per cent of target populations in Brazil. In these field trials, experiments were not performed to assess whether GM mosquitoes might persist in the wild.
A recent study from the Powell lab at Yale University has since confirmed that some of the offspring of the GM mosquitoes didn’t succumb to the self-limiting lethal gene and survived to adulthood. They were able to breed with native mosquitoes and thereby introduce some of their genes into the wild population
Meanwhile, the impact of mosquitoes carrying these new genes remains largely unknown. One significant worry is that a new breed of mosquito might emerge that is more difficult to control. These new genes could also potentially alter evolutionary pressures on viruses carried by mosquitoes, like dengue fever, in unpredictable ways. This includes potentially increasing their virulence or changing their host-insect interactions. These are hypothetical risks that have been raised by scientists, and reflect the need for further study.
What is the desired effect of releasing GM mosquitoes containing the ‘Self-limiting Gene’?
739 0617f928f9737a63d8affd566
617f928f9737a63d8affd566Every year, around one million people die of mosquitoborne diseases according to the World Health Organization (WHO). This is why mosquitoes are considered one of the deadliest living creatures on the planet — not because they are lethal themselves, but because many of the viruses and parasites they transmit are
In the absence of an effective vaccine for dengue fever, Zika fever, chikungunya and other mosquito-borne diseases, researchers have developed genetic strategies to reduce mosquito populations. One such strategy involves the release into the wild of genetically modified (GM) mosquitoes that express a lethal gene — a strategy believed to have little impact on the overall DNA of wild populations of mosquitoes
The transfer of new genes from GM organisms to wild or domesticated non-GM populations is a key criticism of GM crops like soybean and corn. There are concerns that the introduction of GM genes into non-target species could have negative consequences for both human and environmental health.
Oxitec, a company that spun out of research at Oxford University in the early 2000s, developed and trademarked GM Friendly™ mosquitoes (also known as strain OX513A of Aedes aegypti). These male GM mosquitoes have what the company describes as a “self-limiting” gene, which means that when these so-called friendly mosquitoes’ mate, their offspring inherit the self-limiting gene which is supposed to prevent them surviving into adulthood.
In theory, when these mosquitoes are released in high numbers, a dramatic reduction in the mosquito population should follow. According to research published by Oxitec researchers in 2015, field trials involving recurring releases of Friendly™ mosquitoes demonstrated a reduction of nearly 95 per cent of target populations in Brazil. In these field trials, experiments were not performed to assess whether GM mosquitoes might persist in the wild.
A recent study from the Powell lab at Yale University has since confirmed that some of the offspring of the GM mosquitoes didn’t succumb to the self-limiting lethal gene and survived to adulthood. They were able to breed with native mosquitoes and thereby introduce some of their genes into the wild population
Meanwhile, the impact of mosquitoes carrying these new genes remains largely unknown. One significant worry is that a new breed of mosquito might emerge that is more difficult to control. These new genes could also potentially alter evolutionary pressures on viruses carried by mosquitoes, like dengue fever, in unpredictable ways. This includes potentially increasing their virulence or changing their host-insect interactions. These are hypothetical risks that have been raised by scientists, and reflect the need for further study.
- 1A substantial reduction in the population of mosquitoes.true
- 2Birth of mosquitoes without a biting mechanismfalse
- 3Decrease in the number of diseases caused due to mosquitoesfalse
- 4Increase in the number of male mosquitoes.false
- 5(e) Both (b) and (c)false
- Show Answer
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- SingleChoice
Answer : 1. "A substantial reduction in the population of mosquitoes. "
Q:Directions :Read the given passage carefully and answer the following questions. Certain parts have been highlighted to help answer the questions.
Every year, around one million people die of mosquitoborne diseases according to the World Health Organization (WHO). This is why mosquitoes are considered one of the deadliest living creatures on the planet — not because they are lethal themselves, but because many of the viruses and parasites they transmit are
In the absence of an effective vaccine for dengue fever, Zika fever, chikungunya and other mosquito-borne diseases, researchers have developed genetic strategies to reduce mosquito populations. One such strategy involves the release into the wild of genetically modified (GM) mosquitoes that express a lethal gene — a strategy believed to have little impact on the overall DNA of wild populations of mosquitoes
The transfer of new genes from GM organisms to wild or domesticated non-GM populations is a key criticism of GM crops like soybean and corn. There are concerns that the introduction of GM genes into non-target species could have negative consequences for both human and environmental health.
Oxitec, a company that spun out of research at Oxford University in the early 2000s, developed and trademarked GM Friendly™ mosquitoes (also known as strain OX513A of Aedes aegypti). These male GM mosquitoes have what the company describes as a “self-limiting” gene, which means that when these so-called friendly mosquitoes’ mate, their offspring inherit the self-limiting gene which is supposed to prevent them surviving into adulthood.
In theory, when these mosquitoes are released in high numbers, a dramatic reduction in the mosquito population should follow. According to research published by Oxitec researchers in 2015, field trials involving recurring releases of Friendly™ mosquitoes demonstrated a reduction of nearly 95 per cent of target populations in Brazil. In these field trials, experiments were not performed to assess whether GM mosquitoes might persist in the wild.
A recent study from the Powell lab at Yale University has since confirmed that some of the offspring of the GM mosquitoes didn’t succumb to the self-limiting lethal gene and survived to adulthood. They were able to breed with native mosquitoes and thereby introduce some of their genes into the wild population
Meanwhile, the impact of mosquitoes carrying these new genes remains largely unknown. One significant worry is that a new breed of mosquito might emerge that is more difficult to control. These new genes could also potentially alter evolutionary pressures on viruses carried by mosquitoes, like dengue fever, in unpredictable ways. This includes potentially increasing their virulence or changing their host-insect interactions. These are hypothetical risks that have been raised by scientists, and reflect the need for further study.
Which of the statements can be considered as true with respect to the passage given?
722 0617f918041b20233b976e00c
617f918041b20233b976e00cEvery year, around one million people die of mosquitoborne diseases according to the World Health Organization (WHO). This is why mosquitoes are considered one of the deadliest living creatures on the planet — not because they are lethal themselves, but because many of the viruses and parasites they transmit are
In the absence of an effective vaccine for dengue fever, Zika fever, chikungunya and other mosquito-borne diseases, researchers have developed genetic strategies to reduce mosquito populations. One such strategy involves the release into the wild of genetically modified (GM) mosquitoes that express a lethal gene — a strategy believed to have little impact on the overall DNA of wild populations of mosquitoes
The transfer of new genes from GM organisms to wild or domesticated non-GM populations is a key criticism of GM crops like soybean and corn. There are concerns that the introduction of GM genes into non-target species could have negative consequences for both human and environmental health.
Oxitec, a company that spun out of research at Oxford University in the early 2000s, developed and trademarked GM Friendly™ mosquitoes (also known as strain OX513A of Aedes aegypti). These male GM mosquitoes have what the company describes as a “self-limiting” gene, which means that when these so-called friendly mosquitoes’ mate, their offspring inherit the self-limiting gene which is supposed to prevent them surviving into adulthood.
In theory, when these mosquitoes are released in high numbers, a dramatic reduction in the mosquito population should follow. According to research published by Oxitec researchers in 2015, field trials involving recurring releases of Friendly™ mosquitoes demonstrated a reduction of nearly 95 per cent of target populations in Brazil. In these field trials, experiments were not performed to assess whether GM mosquitoes might persist in the wild.
A recent study from the Powell lab at Yale University has since confirmed that some of the offspring of the GM mosquitoes didn’t succumb to the self-limiting lethal gene and survived to adulthood. They were able to breed with native mosquitoes and thereby introduce some of their genes into the wild population
Meanwhile, the impact of mosquitoes carrying these new genes remains largely unknown. One significant worry is that a new breed of mosquito might emerge that is more difficult to control. These new genes could also potentially alter evolutionary pressures on viruses carried by mosquitoes, like dengue fever, in unpredictable ways. This includes potentially increasing their virulence or changing their host-insect interactions. These are hypothetical risks that have been raised by scientists, and reflect the need for further study.
- 1Field trials on Genetically modified mosquitoes showed reduction of 96% target populations.false
- 2Oxitec trademarked the GM Friendly mosquitoes in 2015.false
- 3The female GM mosquito has a self-limiting genefalse
- 4Both (a) and (b)false
- 5None of the abovetrue
- Show Answer
- Workspace
- SingleChoice
Answer : 5. "None of the above"
Q:Directions :Read the given passage carefully and answer the following questions. Certain parts have been highlighted to help answer the questions.
Every year, around one million people die of mosquitoborne diseases according to the World Health Organization (WHO). This is why mosquitoes are considered one of the deadliest living creatures on the planet — not because they are lethal themselves, but because many of the viruses and parasites they transmit are
In the absence of an effective vaccine for dengue fever, Zika fever, chikungunya and other mosquito-borne diseases, researchers have developed genetic strategies to reduce mosquito populations. One such strategy involves the release into the wild of genetically modified (GM) mosquitoes that express a lethal gene — a strategy believed to have little impact on the overall DNA of wild populations of mosquitoes
The transfer of new genes from GM organisms to wild or domesticated non-GM populations is a key criticism of GM crops like soybean and corn. There are concerns that the introduction of GM genes into non-target species could have negative consequences for both human and environmental health.
Oxitec, a company that spun out of research at Oxford University in the early 2000s, developed and trademarked GM Friendly™ mosquitoes (also known as strain OX513A of Aedes aegypti). These male GM mosquitoes have what the company describes as a “self-limiting” gene, which means that when these so-called friendly mosquitoes’ mate, their offspring inherit the self-limiting gene which is supposed to prevent them surviving into adulthood.
In theory, when these mosquitoes are released in high numbers, a dramatic reduction in the mosquito population should follow. According to research published by Oxitec researchers in 2015, field trials involving recurring releases of Friendly™ mosquitoes demonstrated a reduction of nearly 95 per cent of target populations in Brazil. In these field trials, experiments were not performed to assess whether GM mosquitoes might persist in the wild.
A recent study from the Powell lab at Yale University has since confirmed that some of the offspring of the GM mosquitoes didn’t succumb to the self-limiting lethal gene and survived to adulthood. They were able to breed with native mosquitoes and thereby introduce some of their genes into the wild population
Meanwhile, the impact of mosquitoes carrying these new genes remains largely unknown. One significant worry is that a new breed of mosquito might emerge that is more difficult to control. These new genes could also potentially alter evolutionary pressures on viruses carried by mosquitoes, like dengue fever, in unpredictable ways. This includes potentially increasing their virulence or changing their host-insect interactions. These are hypothetical risks that have been raised by scientists, and reflect the need for further study.
What can be the potential side effect(s) of genetically modified mosquito offspring?
637 0617f90901cd87833baf2522a
617f90901cd87833baf2522aEvery year, around one million people die of mosquitoborne diseases according to the World Health Organization (WHO). This is why mosquitoes are considered one of the deadliest living creatures on the planet — not because they are lethal themselves, but because many of the viruses and parasites they transmit are
In the absence of an effective vaccine for dengue fever, Zika fever, chikungunya and other mosquito-borne diseases, researchers have developed genetic strategies to reduce mosquito populations. One such strategy involves the release into the wild of genetically modified (GM) mosquitoes that express a lethal gene — a strategy believed to have little impact on the overall DNA of wild populations of mosquitoes
The transfer of new genes from GM organisms to wild or domesticated non-GM populations is a key criticism of GM crops like soybean and corn. There are concerns that the introduction of GM genes into non-target species could have negative consequences for both human and environmental health.
Oxitec, a company that spun out of research at Oxford University in the early 2000s, developed and trademarked GM Friendly™ mosquitoes (also known as strain OX513A of Aedes aegypti). These male GM mosquitoes have what the company describes as a “self-limiting” gene, which means that when these so-called friendly mosquitoes’ mate, their offspring inherit the self-limiting gene which is supposed to prevent them surviving into adulthood.
In theory, when these mosquitoes are released in high numbers, a dramatic reduction in the mosquito population should follow. According to research published by Oxitec researchers in 2015, field trials involving recurring releases of Friendly™ mosquitoes demonstrated a reduction of nearly 95 per cent of target populations in Brazil. In these field trials, experiments were not performed to assess whether GM mosquitoes might persist in the wild.
A recent study from the Powell lab at Yale University has since confirmed that some of the offspring of the GM mosquitoes didn’t succumb to the self-limiting lethal gene and survived to adulthood. They were able to breed with native mosquitoes and thereby introduce some of their genes into the wild population
Meanwhile, the impact of mosquitoes carrying these new genes remains largely unknown. One significant worry is that a new breed of mosquito might emerge that is more difficult to control. These new genes could also potentially alter evolutionary pressures on viruses carried by mosquitoes, like dengue fever, in unpredictable ways. This includes potentially increasing their virulence or changing their host-insect interactions. These are hypothetical risks that have been raised by scientists, and reflect the need for further study.
- 1Evolution of a breed of mosquitoes which are more difficult to controlfalse
- 2Increase in the severity of diseases being currently transmitted by mosquitoes.false
- 3Change in host-insect interactions.false
- 4Loss of natural populations of mosquitoesfalse
- 5(a), (b) and (c)true
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