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Questions based on the following passage and supplementary material.This passage is from David Biello, “Can Tiny Plankton Help Reverse Climate Change?” ©2015 by David Biello. Originally published in Aeon (http://aeon.co/) on July1, 2014.The forbidding sea known as the SouthernOcean surrounds Antarctica with a chillycurrent, locking it in a deep freeze like a moatreaching to the ocean floor. Dangerous icebergs(5) hide in its gloom. Its churning swells sometimesserve up freak waves that can easily flip ships.In this violent place Victor Smetacek hopes totransform Earth’s atmosphere.Since the 1980s, Smetacek has studied the(10) plankton—tiny animals, protists, algae, andbacteria—that fill the Southern Ocean. Planktonis our planet’s most prolific life form, providingthe base layer of the global food chain.Much of the oxygen we breathe comes(15) from just one species of cyanobacteria,Prochlorococcus, which has dominated Earth’soxygen production for the last 2.4 billion years.These minuscule marine plants produce moreoxygen than all of the planet’s forests combined.(20) Their steady breathing is limited only by a lackof key nutritional elements. If enough of thesenutrients are supplied by dust off a continent orfertilizer run-off from farm fields, the oceans canproduce blooms that can be seen from space.(25) Many of these plankton pastures are heldback by iron shortages, especially in places thatare largely cut off from continental dust and dirt.With access to more iron, the plankton wouldproliferate and siphon more and more planet-(30) heating CO2 from the atmosphere. Back in 1988,the late John Martin, then an oceanographer atthe Moss Landing Marine Observatory, said: “Give mea half tanker of iron, and I will give you an ice age.”Iron fertilization could potentially sequester(35) as much as one billion metric tons of carbondioxide annually, and keep it deep in the ocean forcenturies. That is slightly more than the CO2 outputof the German economy, and roughly one-eighthof humanity’s entire greenhouse gas output.(40) Using an iron sulphate waste sold as alawn treatment in Germany, Smetacek and hiscolleagues set out in 2004 to supply the planktonwith the nutrient they needed. Fertilizing thewaters, they hoped, would promote blooms to help(45) sea life thrive all the way up the food chain, evento whale populations, which were still recoveringfrom overhunting. And, more importantly, theuneaten plankton could suck out CO2 from the airuntil they died and sank to the sea floor, thereby(50) providing natural carbon sequestration.Smetacek’s ship dumped enough of the ironsulfate to raise the iron concentration by 0.01gram per square meter in a 167-square-kilometerself-contained swirl of water that could maintain(55) its shape for weeks or even months. Smetacek andhis crew waited, as he described in his log, “withthe fatalistic patience of the farmer, watching thecrop develop in the painstakingly selected field.”Over the course of two weeks, thirteen species of(60) diatoms bloomed down to depths of 100 meters.Then the bloom began to die in large enoughnumbers to overwhelm natural systems of decay,falling like snow to depths of 500 meters. Abouthalf of them continued on even further, sinking(65) more than 3,000 meters to the sea floor.For two weeks, Smetacek induced carbonto fall to the sea floor at the highest rate everobserved—34 times faster than normal.This marine tinkering could help buffer the(70) ever-increasing concentrations of CO2 in theatmosphere, concentrations that have touched400 parts-per-million, levels never beforeexperienced in the history of our species.Yet environmentalists were outraged by(75) Smetacek’s project. Activists stoked fears thatthe iron could lead to a toxic algal bloom or a“dead zone” like the one created each summerin the Gulf of Mexico, where the fertilizers fromMidwestern cornfields gush out of the Mississippi(80) river, stoking algal blooms that then die and areconsumed by other microbes, which consumeall the available oxygen in the surroundingwaters, causing fish to flee and suffocating crabsand worms. As a result of these objections, there(85) havebeen no scientific research cruises since2009, and none are planned for the immediatefuture.Smetacek suggests that commerce might bethe only way to motivate further research into(90) iron fertilization. Replenishing missing krill, andthe whales it supports, could be the best route tobroader acceptance of the practice.The ocean is no longer a vast, unknowablewilderness. Instead, it’s a viable arena for(95) large-scale manipulation of the planetaryenvironment. We have tamed the heaving, alienworld of the sea and, though doing so can makeus uncomfortable, in the end it might undo a greatdeal of the damage we have already done.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 5–6 (“Its churning . . . ships”)b)Lines 75–84 (“Activists stoked . . . crabs and worms”)c)Lines 90–92 (“Replenishing . . . the practice”)d)Lines 94–96 (“Instead, it’s . . . environment”)Correct answer is option 'D'. Can you explain this answer? for SAT 2025 is part of SAT preparation. The Question and answers have been prepared according to the SAT exam syllabus. Information about Questions based on the following passage and supplementary material.This passage is from David Biello, “Can Tiny Plankton Help Reverse Climate Change?” ©2015 by David Biello. Originally published in Aeon (http://aeon.co/) on July1, 2014.The forbidding sea known as the SouthernOcean surrounds Antarctica with a chillycurrent, locking it in a deep freeze like a moatreaching to the ocean floor. Dangerous icebergs(5) hide in its gloom. Its churning swells sometimesserve up freak waves that can easily flip ships.In this violent place Victor Smetacek hopes totransform Earth’s atmosphere.Since the 1980s, Smetacek has studied the(10) plankton—tiny animals, protists, algae, andbacteria—that fill the Southern Ocean. Planktonis our planet’s most prolific life form, providingthe base layer of the global food chain.Much of the oxygen we breathe comes(15) from just one species of cyanobacteria,Prochlorococcus, which has dominated Earth’soxygen production for the last 2.4 billion years.These minuscule marine plants produce moreoxygen than all of the planet’s forests combined.(20) Their steady breathing is limited only by a lackof key nutritional elements. If enough of thesenutrients are supplied by dust off a continent orfertilizer run-off from farm fields, the oceans canproduce blooms that can be seen from space.(25) Many of these plankton pastures are heldback by iron shortages, especially in places thatare largely cut off from continental dust and dirt.With access to more iron, the plankton wouldproliferate and siphon more and more planet-(30) heating CO2 from the atmosphere. Back in 1988,the late John Martin, then an oceanographer atthe Moss Landing Marine Observatory, said: “Give mea half tanker of iron, and I will give you an ice age.”Iron fertilization could potentially sequester(35) as much as one billion metric tons of carbondioxide annually, and keep it deep in the ocean forcenturies. That is slightly more than the CO2 outputof the German economy, and roughly one-eighthof humanity’s entire greenhouse gas output.(40) Using an iron sulphate waste sold as alawn treatment in Germany, Smetacek and hiscolleagues set out in 2004 to supply the planktonwith the nutrient they needed. Fertilizing thewaters, they hoped, would promote blooms to help(45) sea life thrive all the way up the food chain, evento whale populations, which were still recoveringfrom overhunting. And, more importantly, theuneaten plankton could suck out CO2 from the airuntil they died and sank to the sea floor, thereby(50) providing natural carbon sequestration.Smetacek’s ship dumped enough of the ironsulfate to raise the iron concentration by 0.01gram per square meter in a 167-square-kilometerself-contained swirl of water that could maintain(55) its shape for weeks or even months. Smetacek andhis crew waited, as he described in his log, “withthe fatalistic patience of the farmer, watching thecrop develop in the painstakingly selected field.”Over the course of two weeks, thirteen species of(60) diatoms bloomed down to depths of 100 meters.Then the bloom began to die in large enoughnumbers to overwhelm natural systems of decay,falling like snow to depths of 500 meters. Abouthalf of them continued on even further, sinking(65) more than 3,000 meters to the sea floor.For two weeks, Smetacek induced carbonto fall to the sea floor at the highest rate everobserved—34 times faster than normal.This marine tinkering could help buffer the(70) ever-increasing concentrations of CO2 in theatmosphere, concentrations that have touched400 parts-per-million, levels never beforeexperienced in the history of our species.Yet environmentalists were outraged by(75) Smetacek’s project. Activists stoked fears thatthe iron could lead to a toxic algal bloom or a“dead zone” like the one created each summerin the Gulf of Mexico, where the fertilizers fromMidwestern cornfields gush out of the Mississippi(80) river, stoking algal blooms that then die and areconsumed by other microbes, which consumeall the available oxygen in the surroundingwaters, causing fish to flee and suffocating crabsand worms. As a result of these objections, there(85) havebeen no scientific research cruises since2009, and none are planned for the immediatefuture.Smetacek suggests that commerce might bethe only way to motivate further research into(90) iron fertilization. Replenishing missing krill, andthe whales it supports, could be the best route tobroader acceptance of the practice.The ocean is no longer a vast, unknowablewilderness. Instead, it’s a viable arena for(95) large-scale manipulation of the planetaryenvironment. We have tamed the heaving, alienworld of the sea and, though doing so can makeus uncomfortable, in the end it might undo a greatdeal of the damage we have already done.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 5–6 (“Its churning . . . ships”)b)Lines 75–84 (“Activists stoked . . . crabs and worms”)c)Lines 90–92 (“Replenishing . . . the practice”)d)Lines 94–96 (“Instead, it’s . . . environment”)Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for SAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Questions based on the following passage and supplementary material.This passage is from David Biello, “Can Tiny Plankton Help Reverse Climate Change?” ©2015 by David Biello. Originally published in Aeon (http://aeon.co/) on July1, 2014.The forbidding sea known as the SouthernOcean surrounds Antarctica with a chillycurrent, locking it in a deep freeze like a moatreaching to the ocean floor. Dangerous icebergs(5) hide in its gloom. Its churning swells sometimesserve up freak waves that can easily flip ships.In this violent place Victor Smetacek hopes totransform Earth’s atmosphere.Since the 1980s, Smetacek has studied the(10) plankton—tiny animals, protists, algae, andbacteria—that fill the Southern Ocean. Planktonis our planet’s most prolific life form, providingthe base layer of the global food chain.Much of the oxygen we breathe comes(15) from just one species of cyanobacteria,Prochlorococcus, which has dominated Earth’soxygen production for the last 2.4 billion years.These minuscule marine plants produce moreoxygen than all of the planet’s forests combined.(20) Their steady breathing is limited only by a lackof key nutritional elements. If enough of thesenutrients are supplied by dust off a continent orfertilizer run-off from farm fields, the oceans canproduce blooms that can be seen from space.(25) Many of these plankton pastures are heldback by iron shortages, especially in places thatare largely cut off from continental dust and dirt.With access to more iron, the plankton wouldproliferate and siphon more and more planet-(30) heating CO2 from the atmosphere. Back in 1988,the late John Martin, then an oceanographer atthe Moss Landing Marine Observatory, said: “Give mea half tanker of iron, and I will give you an ice age.”Iron fertilization could potentially sequester(35) as much as one billion metric tons of carbondioxide annually, and keep it deep in the ocean forcenturies. That is slightly more than the CO2 outputof the German economy, and roughly one-eighthof humanity’s entire greenhouse gas output.(40) Using an iron sulphate waste sold as alawn treatment in Germany, Smetacek and hiscolleagues set out in 2004 to supply the planktonwith the nutrient they needed. Fertilizing thewaters, they hoped, would promote blooms to help(45) sea life thrive all the way up the food chain, evento whale populations, which were still recoveringfrom overhunting. And, more importantly, theuneaten plankton could suck out CO2 from the airuntil they died and sank to the sea floor, thereby(50) providing natural carbon sequestration.Smetacek’s ship dumped enough of the ironsulfate to raise the iron concentration by 0.01gram per square meter in a 167-square-kilometerself-contained swirl of water that could maintain(55) its shape for weeks or even months. Smetacek andhis crew waited, as he described in his log, “withthe fatalistic patience of the farmer, watching thecrop develop in the painstakingly selected field.”Over the course of two weeks, thirteen species of(60) diatoms bloomed down to depths of 100 meters.Then the bloom began to die in large enoughnumbers to overwhelm natural systems of decay,falling like snow to depths of 500 meters. Abouthalf of them continued on even further, sinking(65) more than 3,000 meters to the sea floor.For two weeks, Smetacek induced carbonto fall to the sea floor at the highest rate everobserved—34 times faster than normal.This marine tinkering could help buffer the(70) ever-increasing concentrations of CO2 in theatmosphere, concentrations that have touched400 parts-per-million, levels never beforeexperienced in the history of our species.Yet environmentalists were outraged by(75) Smetacek’s project. Activists stoked fears thatthe iron could lead to a toxic algal bloom or a“dead zone” like the one created each summerin the Gulf of Mexico, where the fertilizers fromMidwestern cornfields gush out of the Mississippi(80) river, stoking algal blooms that then die and areconsumed by other microbes, which consumeall the available oxygen in the surroundingwaters, causing fish to flee and suffocating crabsand worms. As a result of these objections, there(85) havebeen no scientific research cruises since2009, and none are planned for the immediatefuture.Smetacek suggests that commerce might bethe only way to motivate further research into(90) iron fertilization. Replenishing missing krill, andthe whales it supports, could be the best route tobroader acceptance of the practice.The ocean is no longer a vast, unknowablewilderness. Instead, it’s a viable arena for(95) large-scale manipulation of the planetaryenvironment. We have tamed the heaving, alienworld of the sea and, though doing so can makeus uncomfortable, in the end it might undo a greatdeal of the damage we have already done.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 5–6 (“Its churning . . . ships”)b)Lines 75–84 (“Activists stoked . . . crabs and worms”)c)Lines 90–92 (“Replenishing . . . the practice”)d)Lines 94–96 (“Instead, it’s . . . environment”)Correct answer is option 'D'. Can you explain this answer?.

Solutions for Questions based on the following passage and supplementary material.This passage is from David Biello, “Can Tiny Plankton Help Reverse Climate Change?” ©2015 by David Biello. Originally published in Aeon (http://aeon.co/) on July1, 2014.The forbidding sea known as the SouthernOcean surrounds Antarctica with a chillycurrent, locking it in a deep freeze like a moatreaching to the ocean floor. Dangerous icebergs(5) hide in its gloom. Its churning swells sometimesserve up freak waves that can easily flip ships.In this violent place Victor Smetacek hopes totransform Earth’s atmosphere.Since the 1980s, Smetacek has studied the(10) plankton—tiny animals, protists, algae, andbacteria—that fill the Southern Ocean. Planktonis our planet’s most prolific life form, providingthe base layer of the global food chain.Much of the oxygen we breathe comes(15) from just one species of cyanobacteria,Prochlorococcus, which has dominated Earth’soxygen production for the last 2.4 billion years.These minuscule marine plants produce moreoxygen than all of the planet’s forests combined.(20) Their steady breathing is limited only by a lackof key nutritional elements. If enough of thesenutrients are supplied by dust off a continent orfertilizer run-off from farm fields, the oceans canproduce blooms that can be seen from space.(25) Many of these plankton pastures are heldback by iron shortages, especially in places thatare largely cut off from continental dust and dirt.With access to more iron, the plankton wouldproliferate and siphon more and more planet-(30) heating CO2 from the atmosphere. Back in 1988,the late John Martin, then an oceanographer atthe Moss Landing Marine Observatory, said: “Give mea half tanker of iron, and I will give you an ice age.”Iron fertilization could potentially sequester(35) as much as one billion metric tons of carbondioxide annually, and keep it deep in the ocean forcenturies. That is slightly more than the CO2 outputof the German economy, and roughly one-eighthof humanity’s entire greenhouse gas output.(40) Using an iron sulphate waste sold as alawn treatment in Germany, Smetacek and hiscolleagues set out in 2004 to supply the planktonwith the nutrient they needed. Fertilizing thewaters, they hoped, would promote blooms to help(45) sea life thrive all the way up the food chain, evento whale populations, which were still recoveringfrom overhunting. And, more importantly, theuneaten plankton could suck out CO2 from the airuntil they died and sank to the sea floor, thereby(50) providing natural carbon sequestration.Smetacek’s ship dumped enough of the ironsulfate to raise the iron concentration by 0.01gram per square meter in a 167-square-kilometerself-contained swirl of water that could maintain(55) its shape for weeks or even months. Smetacek andhis crew waited, as he described in his log, “withthe fatalistic patience of the farmer, watching thecrop develop in the painstakingly selected field.”Over the course of two weeks, thirteen species of(60) diatoms bloomed down to depths of 100 meters.Then the bloom began to die in large enoughnumbers to overwhelm natural systems of decay,falling like snow to depths of 500 meters. Abouthalf of them continued on even further, sinking(65) more than 3,000 meters to the sea floor.For two weeks, Smetacek induced carbonto fall to the sea floor at the highest rate everobserved—34 times faster than normal.This marine tinkering could help buffer the(70) ever-increasing concentrations of CO2 in theatmosphere, concentrations that have touched400 parts-per-million, levels never beforeexperienced in the history of our species.Yet environmentalists were outraged by(75) Smetacek’s project. Activists stoked fears thatthe iron could lead to a toxic algal bloom or a“dead zone” like the one created each summerin the Gulf of Mexico, where the fertilizers fromMidwestern cornfields gush out of the Mississippi(80) river, stoking algal blooms that then die and areconsumed by other microbes, which consumeall the available oxygen in the surroundingwaters, causing fish to flee and suffocating crabsand worms. As a result of these objections, there(85) havebeen no scientific research cruises since2009, and none are planned for the immediatefuture.Smetacek suggests that commerce might bethe only way to motivate further research into(90) iron fertilization. Replenishing missing krill, andthe whales it supports, could be the best route tobroader acceptance of the practice.The ocean is no longer a vast, unknowablewilderness. Instead, it’s a viable arena for(95) large-scale manipulation of the planetaryenvironment. We have tamed the heaving, alienworld of the sea and, though doing so can makeus uncomfortable, in the end it might undo a greatdeal of the damage we have already done.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 5–6 (“Its churning . . . ships”)b)Lines 75–84 (“Activists stoked . . . crabs and worms”)c)Lines 90–92 (“Replenishing . . . the practice”)d)Lines 94–96 (“Instead, it’s . . . environment”)Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for SAT. Download more important topics, notes, lectures and mock test series for SAT Exam by signing up for free.

Here you can find the meaning of Questions based on the following passage and supplementary material.This passage is from David Biello, “Can Tiny Plankton Help Reverse Climate Change?” ©2015 by David Biello. Originally published in Aeon (http://aeon.co/) on July1, 2014.The forbidding sea known as the SouthernOcean surrounds Antarctica with a chillycurrent, locking it in a deep freeze like a moatreaching to the ocean floor. Dangerous icebergs(5) hide in its gloom. Its churning swells sometimesserve up freak waves that can easily flip ships.In this violent place Victor Smetacek hopes totransform Earth’s atmosphere.Since the 1980s, Smetacek has studied the(10) plankton—tiny animals, protists, algae, andbacteria—that fill the Southern Ocean. Planktonis our planet’s most prolific life form, providingthe base layer of the global food chain.Much of the oxygen we breathe comes(15) from just one species of cyanobacteria,Prochlorococcus, which has dominated Earth’soxygen production for the last 2.4 billion years.These minuscule marine plants produce moreoxygen than all of the planet’s forests combined.(20) Their steady breathing is limited only by a lackof key nutritional elements. If enough of thesenutrients are supplied by dust off a continent orfertilizer run-off from farm fields, the oceans canproduce blooms that can be seen from space.(25) Many of these plankton pastures are heldback by iron shortages, especially in places thatare largely cut off from continental dust and dirt.With access to more iron, the plankton wouldproliferate and siphon more and more planet-(30) heating CO2 from the atmosphere. Back in 1988,the late John Martin, then an oceanographer atthe Moss Landing Marine Observatory, said: “Give mea half tanker of iron, and I will give you an ice age.”Iron fertilization could potentially sequester(35) as much as one billion metric tons of carbondioxide annually, and keep it deep in the ocean forcenturies. That is slightly more than the CO2 outputof the German economy, and roughly one-eighthof humanity’s entire greenhouse gas output.(40) Using an iron sulphate waste sold as alawn treatment in Germany, Smetacek and hiscolleagues set out in 2004 to supply the planktonwith the nutrient they needed. Fertilizing thewaters, they hoped, would promote blooms to help(45) sea life thrive all the way up the food chain, evento whale populations, which were still recoveringfrom overhunting. And, more importantly, theuneaten plankton could suck out CO2 from the airuntil they died and sank to the sea floor, thereby(50) providing natural carbon sequestration.Smetacek’s ship dumped enough of the ironsulfate to raise the iron concentration by 0.01gram per square meter in a 167-square-kilometerself-contained swirl of water that could maintain(55) its shape for weeks or even months. Smetacek andhis crew waited, as he described in his log, “withthe fatalistic patience of the farmer, watching thecrop develop in the painstakingly selected field.”Over the course of two weeks, thirteen species of(60) diatoms bloomed down to depths of 100 meters.Then the bloom began to die in large enoughnumbers to overwhelm natural systems of decay,falling like snow to depths of 500 meters. Abouthalf of them continued on even further, sinking(65) more than 3,000 meters to the sea floor.For two weeks, Smetacek induced carbonto fall to the sea floor at the highest rate everobserved—34 times faster than normal.This marine tinkering could help buffer the(70) ever-increasing concentrations of CO2 in theatmosphere, concentrations that have touched400 parts-per-million, levels never beforeexperienced in the history of our species.Yet environmentalists were outraged by(75) Smetacek’s project. Activists stoked fears thatthe iron could lead to a toxic algal bloom or a“dead zone” like the one created each summerin the Gulf of Mexico, where the fertilizers fromMidwestern cornfields gush out of the Mississippi(80) river, stoking algal blooms that then die and areconsumed by other microbes, which consumeall the available oxygen in the surroundingwaters, causing fish to flee and suffocating crabsand worms. As a result of these objections, there(85) havebeen no scientific research cruises since2009, and none are planned for the immediatefuture.Smetacek suggests that commerce might bethe only way to motivate further research into(90) iron fertilization. Replenishing missing krill, andthe whales it supports, could be the best route tobroader acceptance of the practice.The ocean is no longer a vast, unknowablewilderness. Instead, it’s a viable arena for(95) large-scale manipulation of the planetaryenvironment. We have tamed the heaving, alienworld of the sea and, though doing so can makeus uncomfortable, in the end it might undo a greatdeal of the damage we have already done.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 5–6 (“Its churning . . . ships”)b)Lines 75–84 (“Activists stoked . . . crabs and worms”)c)Lines 90–92 (“Replenishing . . . the practice”)d)Lines 94–96 (“Instead, it’s . . . environment”)Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Questions based on the following passage and supplementary material.This passage is from David Biello, “Can Tiny Plankton Help Reverse Climate Change?” ©2015 by David Biello. Originally published in Aeon (http://aeon.co/) on July1, 2014.The forbidding sea known as the SouthernOcean surrounds Antarctica with a chillycurrent, locking it in a deep freeze like a moatreaching to the ocean floor. Dangerous icebergs(5) hide in its gloom. Its churning swells sometimesserve up freak waves that can easily flip ships.In this violent place Victor Smetacek hopes totransform Earth’s atmosphere.Since the 1980s, Smetacek has studied the(10) plankton—tiny animals, protists, algae, andbacteria—that fill the Southern Ocean. Planktonis our planet’s most prolific life form, providingthe base layer of the global food chain.Much of the oxygen we breathe comes(15) from just one species of cyanobacteria,Prochlorococcus, which has dominated Earth’soxygen production for the last 2.4 billion years.These minuscule marine plants produce moreoxygen than all of the planet’s forests combined.(20) Their steady breathing is limited only by a lackof key nutritional elements. If enough of thesenutrients are supplied by dust off a continent orfertilizer run-off from farm fields, the oceans canproduce blooms that can be seen from space.(25) Many of these plankton pastures are heldback by iron shortages, especially in places thatare largely cut off from continental dust and dirt.With access to more iron, the plankton wouldproliferate and siphon more and more planet-(30) heating CO2 from the atmosphere. Back in 1988,the late John Martin, then an oceanographer atthe Moss Landing Marine Observatory, said: “Give mea half tanker of iron, and I will give you an ice age.”Iron fertilization could potentially sequester(35) as much as one billion metric tons of carbondioxide annually, and keep it deep in the ocean forcenturies. That is slightly more than the CO2 outputof the German economy, and roughly one-eighthof humanity’s entire greenhouse gas output.(40) Using an iron sulphate waste sold as alawn treatment in Germany, Smetacek and hiscolleagues set out in 2004 to supply the planktonwith the nutrient they needed. Fertilizing thewaters, they hoped, would promote blooms to help(45) sea life thrive all the way up the food chain, evento whale populations, which were still recoveringfrom overhunting. And, more importantly, theuneaten plankton could suck out CO2 from the airuntil they died and sank to the sea floor, thereby(50) providing natural carbon sequestration.Smetacek’s ship dumped enough of the ironsulfate to raise the iron concentration by 0.01gram per square meter in a 167-square-kilometerself-contained swirl of water that could maintain(55) its shape for weeks or even months. Smetacek andhis crew waited, as he described in his log, “withthe fatalistic patience of the farmer, watching thecrop develop in the painstakingly selected field.”Over the course of two weeks, thirteen species of(60) diatoms bloomed down to depths of 100 meters.Then the bloom began to die in large enoughnumbers to overwhelm natural systems of decay,falling like snow to depths of 500 meters. Abouthalf of them continued on even further, sinking(65) more than 3,000 meters to the sea floor.For two weeks, Smetacek induced carbonto fall to the sea floor at the highest rate everobserved—34 times faster than normal.This marine tinkering could help buffer the(70) ever-increasing concentrations of CO2 in theatmosphere, concentrations that have touched400 parts-per-million, levels never beforeexperienced in the history of our species.Yet environmentalists were outraged by(75) Smetacek’s project. Activists stoked fears thatthe iron could lead to a toxic algal bloom or a“dead zone” like the one created each summerin the Gulf of Mexico, where the fertilizers fromMidwestern cornfields gush out of the Mississippi(80) river, stoking algal blooms that then die and areconsumed by other microbes, which consumeall the available oxygen in the surroundingwaters, causing fish to flee and suffocating crabsand worms. As a result of these objections, there(85) havebeen no scientific research cruises since2009, and none are planned for the immediatefuture.Smetacek suggests that commerce might bethe only way to motivate further research into(90) iron fertilization. Replenishing missing krill, andthe whales it supports, could be the best route tobroader acceptance of the practice.The ocean is no longer a vast, unknowablewilderness. Instead, it’s a viable arena for(95) large-scale manipulation of the planetaryenvironment. We have tamed the heaving, alienworld of the sea and, though doing so can makeus uncomfortable, in the end it might undo a greatdeal of the damage we have already done.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 5–6 (“Its churning . . . ships”)b)Lines 75–84 (“Activists stoked . . . crabs and worms”)c)Lines 90–92 (“Replenishing . . . the practice”)d)Lines 94–96 (“Instead, it’s . . . environment”)Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Questions based on the following passage and supplementary material.This passage is from David Biello, “Can Tiny Plankton Help Reverse Climate Change?” ©2015 by David Biello. Originally published in Aeon (http://aeon.co/) on July1, 2014.The forbidding sea known as the SouthernOcean surrounds Antarctica with a chillycurrent, locking it in a deep freeze like a moatreaching to the ocean floor. Dangerous icebergs(5) hide in its gloom. Its churning swells sometimesserve up freak waves that can easily flip ships.In this violent place Victor Smetacek hopes totransform Earth’s atmosphere.Since the 1980s, Smetacek has studied the(10) plankton—tiny animals, protists, algae, andbacteria—that fill the Southern Ocean. Planktonis our planet’s most prolific life form, providingthe base layer of the global food chain.Much of the oxygen we breathe comes(15) from just one species of cyanobacteria,Prochlorococcus, which has dominated Earth’soxygen production for the last 2.4 billion years.These minuscule marine plants produce moreoxygen than all of the planet’s forests combined.(20) Their steady breathing is limited only by a lackof key nutritional elements. If enough of thesenutrients are supplied by dust off a continent orfertilizer run-off from farm fields, the oceans canproduce blooms that can be seen from space.(25) Many of these plankton pastures are heldback by iron shortages, especially in places thatare largely cut off from continental dust and dirt.With access to more iron, the plankton wouldproliferate and siphon more and more planet-(30) heating CO2 from the atmosphere. Back in 1988,the late John Martin, then an oceanographer atthe Moss Landing Marine Observatory, said: “Give mea half tanker of iron, and I will give you an ice age.”Iron fertilization could potentially sequester(35) as much as one billion metric tons of carbondioxide annually, and keep it deep in the ocean forcenturies. That is slightly more than the CO2 outputof the German economy, and roughly one-eighthof humanity’s entire greenhouse gas output.(40) Using an iron sulphate waste sold as alawn treatment in Germany, Smetacek and hiscolleagues set out in 2004 to supply the planktonwith the nutrient they needed. Fertilizing thewaters, they hoped, would promote blooms to help(45) sea life thrive all the way up the food chain, evento whale populations, which were still recoveringfrom overhunting. And, more importantly, theuneaten plankton could suck out CO2 from the airuntil they died and sank to the sea floor, thereby(50) providing natural carbon sequestration.Smetacek’s ship dumped enough of the ironsulfate to raise the iron concentration by 0.01gram per square meter in a 167-square-kilometerself-contained swirl of water that could maintain(55) its shape for weeks or even months. Smetacek andhis crew waited, as he described in his log, “withthe fatalistic patience of the farmer, watching thecrop develop in the painstakingly selected field.”Over the course of two weeks, thirteen species of(60) diatoms bloomed down to depths of 100 meters.Then the bloom began to die in large enoughnumbers to overwhelm natural systems of decay,falling like snow to depths of 500 meters. Abouthalf of them continued on even further, sinking(65) more than 3,000 meters to the sea floor.For two weeks, Smetacek induced carbonto fall to the sea floor at the highest rate everobserved—34 times faster than normal.This marine tinkering could help buffer the(70) ever-increasing concentrations of CO2 in theatmosphere, concentrations that have touched400 parts-per-million, levels never beforeexperienced in the history of our species.Yet environmentalists were outraged by(75) Smetacek’s project. Activists stoked fears thatthe iron could lead to a toxic algal bloom or a“dead zone” like the one created each summerin the Gulf of Mexico, where the fertilizers fromMidwestern cornfields gush out of the Mississippi(80) river, stoking algal blooms that then die and areconsumed by other microbes, which consumeall the available oxygen in the surroundingwaters, causing fish to flee and suffocating crabsand worms. As a result of these objections, there(85) havebeen no scientific research cruises since2009, and none are planned for the immediatefuture.Smetacek suggests that commerce might bethe only way to motivate further research into(90) iron fertilization. Replenishing missing krill, andthe whales it supports, could be the best route tobroader acceptance of the practice.The ocean is no longer a vast, unknowablewilderness. Instead, it’s a viable arena for(95) large-scale manipulation of the planetaryenvironment. We have tamed the heaving, alienworld of the sea and, though doing so can makeus uncomfortable, in the end it might undo a greatdeal of the damage we have already done.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 5–6 (“Its churning . . . ships”)b)Lines 75–84 (“Activists stoked . . . crabs and worms”)c)Lines 90–92 (“Replenishing . . . the practice”)d)Lines 94–96 (“Instead, it’s . . . environment”)Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Questions based on the following passage and supplementary material.This passage is from David Biello, “Can Tiny Plankton Help Reverse Climate Change?” ©2015 by David Biello. Originally published in Aeon (http://aeon.co/) on July1, 2014.The forbidding sea known as the SouthernOcean surrounds Antarctica with a chillycurrent, locking it in a deep freeze like a moatreaching to the ocean floor. Dangerous icebergs(5) hide in its gloom. Its churning swells sometimesserve up freak waves that can easily flip ships.In this violent place Victor Smetacek hopes totransform Earth’s atmosphere.Since the 1980s, Smetacek has studied the(10) plankton—tiny animals, protists, algae, andbacteria—that fill the Southern Ocean. Planktonis our planet’s most prolific life form, providingthe base layer of the global food chain.Much of the oxygen we breathe comes(15) from just one species of cyanobacteria,Prochlorococcus, which has dominated Earth’soxygen production for the last 2.4 billion years.These minuscule marine plants produce moreoxygen than all of the planet’s forests combined.(20) Their steady breathing is limited only by a lackof key nutritional elements. If enough of thesenutrients are supplied by dust off a continent orfertilizer run-off from farm fields, the oceans canproduce blooms that can be seen from space.(25) Many of these plankton pastures are heldback by iron shortages, especially in places thatare largely cut off from continental dust and dirt.With access to more iron, the plankton wouldproliferate and siphon more and more planet-(30) heating CO2 from the atmosphere. Back in 1988,the late John Martin, then an oceanographer atthe Moss Landing Marine Observatory, said: “Give mea half tanker of iron, and I will give you an ice age.”Iron fertilization could potentially sequester(35) as much as one billion metric tons of carbondioxide annually, and keep it deep in the ocean forcenturies. That is slightly more than the CO2 outputof the German economy, and roughly one-eighthof humanity’s entire greenhouse gas output.(40) Using an iron sulphate waste sold as alawn treatment in Germany, Smetacek and hiscolleagues set out in 2004 to supply the planktonwith the nutrient they needed. Fertilizing thewaters, they hoped, would promote blooms to help(45) sea life thrive all the way up the food chain, evento whale populations, which were still recoveringfrom overhunting. And, more importantly, theuneaten plankton could suck out CO2 from the airuntil they died and sank to the sea floor, thereby(50) providing natural carbon sequestration.Smetacek’s ship dumped enough of the ironsulfate to raise the iron concentration by 0.01gram per square meter in a 167-square-kilometerself-contained swirl of water that could maintain(55) its shape for weeks or even months. Smetacek andhis crew waited, as he described in his log, “withthe fatalistic patience of the farmer, watching thecrop develop in the painstakingly selected field.”Over the course of two weeks, thirteen species of(60) diatoms bloomed down to depths of 100 meters.Then the bloom began to die in large enoughnumbers to overwhelm natural systems of decay,falling like snow to depths of 500 meters. Abouthalf of them continued on even further, sinking(65) more than 3,000 meters to the sea floor.For two weeks, Smetacek induced carbonto fall to the sea floor at the highest rate everobserved—34 times faster than normal.This marine tinkering could help buffer the(70) ever-increasing concentrations of CO2 in theatmosphere, concentrations that have touched400 parts-per-million, levels never beforeexperienced in the history of our species.Yet environmentalists were outraged by(75) Smetacek’s project. Activists stoked fears thatthe iron could lead to a toxic algal bloom or a“dead zone” like the one created each summerin the Gulf of Mexico, where the fertilizers fromMidwestern cornfields gush out of the Mississippi(80) river, stoking algal blooms that then die and areconsumed by other microbes, which consumeall the available oxygen in the surroundingwaters, causing fish to flee and suffocating crabsand worms. As a result of these objections, there(85) havebeen no scientific research cruises since2009, and none are planned for the immediatefuture.Smetacek suggests that commerce might bethe only way to motivate further research into(90) iron fertilization. Replenishing missing krill, andthe whales it supports, could be the best route tobroader acceptance of the practice.The ocean is no longer a vast, unknowablewilderness. Instead, it’s a viable arena for(95) large-scale manipulation of the planetaryenvironment. We have tamed the heaving, alienworld of the sea and, though doing so can makeus uncomfortable, in the end it might undo a greatdeal of the damage we have already done.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 5–6 (“Its churning . . . ships”)b)Lines 75–84 (“Activists stoked . . . crabs and worms”)c)Lines 90–92 (“Replenishing . . . the practice”)d)Lines 94–96 (“Instead, it’s . . . environment”)Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Questions based on the following passage and supplementary material.This passage is from David Biello, “Can Tiny Plankton Help Reverse Climate Change?” ©2015 by David Biello. Originally published in Aeon (http://aeon.co/) on July1, 2014.The forbidding sea known as the SouthernOcean surrounds Antarctica with a chillycurrent, locking it in a deep freeze like a moatreaching to the ocean floor. Dangerous icebergs(5) hide in its gloom. Its churning swells sometimesserve up freak waves that can easily flip ships.In this violent place Victor Smetacek hopes totransform Earth’s atmosphere.Since the 1980s, Smetacek has studied the(10) plankton—tiny animals, protists, algae, andbacteria—that fill the Southern Ocean. Planktonis our planet’s most prolific life form, providingthe base layer of the global food chain.Much of the oxygen we breathe comes(15) from just one species of cyanobacteria,Prochlorococcus, which has dominated Earth’soxygen production for the last 2.4 billion years.These minuscule marine plants produce moreoxygen than all of the planet’s forests combined.(20) Their steady breathing is limited only by a lackof key nutritional elements. If enough of thesenutrients are supplied by dust off a continent orfertilizer run-off from farm fields, the oceans canproduce blooms that can be seen from space.(25) Many of these plankton pastures are heldback by iron shortages, especially in places thatare largely cut off from continental dust and dirt.With access to more iron, the plankton wouldproliferate and siphon more and more planet-(30) heating CO2 from the atmosphere. Back in 1988,the late John Martin, then an oceanographer atthe Moss Landing Marine Observatory, said: “Give mea half tanker of iron, and I will give you an ice age.”Iron fertilization could potentially sequester(35) as much as one billion metric tons of carbondioxide annually, and keep it deep in the ocean forcenturies. That is slightly more than the CO2 outputof the German economy, and roughly one-eighthof humanity’s entire greenhouse gas output.(40) Using an iron sulphate waste sold as alawn treatment in Germany, Smetacek and hiscolleagues set out in 2004 to supply the planktonwith the nutrient they needed. Fertilizing thewaters, they hoped, would promote blooms to help(45) sea life thrive all the way up the food chain, evento whale populations, which were still recoveringfrom overhunting. And, more importantly, theuneaten plankton could suck out CO2 from the airuntil they died and sank to the sea floor, thereby(50) providing natural carbon sequestration.Smetacek’s ship dumped enough of the ironsulfate to raise the iron concentration by 0.01gram per square meter in a 167-square-kilometerself-contained swirl of water that could maintain(55) its shape for weeks or even months. Smetacek andhis crew waited, as he described in his log, “withthe fatalistic patience of the farmer, watching thecrop develop in the painstakingly selected field.”Over the course of two weeks, thirteen species of(60) diatoms bloomed down to depths of 100 meters.Then the bloom began to die in large enoughnumbers to overwhelm natural systems of decay,falling like snow to depths of 500 meters. Abouthalf of them continued on even further, sinking(65) more than 3,000 meters to the sea floor.For two weeks, Smetacek induced carbonto fall to the sea floor at the highest rate everobserved—34 times faster than normal.This marine tinkering could help buffer the(70) ever-increasing concentrations of CO2 in theatmosphere, concentrations that have touched400 parts-per-million, levels never beforeexperienced in the history of our species.Yet environmentalists were outraged by(75) Smetacek’s project. Activists stoked fears thatthe iron could lead to a toxic algal bloom or a“dead zone” like the one created each summerin the Gulf of Mexico, where the fertilizers fromMidwestern cornfields gush out of the Mississippi(80) river, stoking algal blooms that then die and areconsumed by other microbes, which consumeall the available oxygen in the surroundingwaters, causing fish to flee and suffocating crabsand worms. As a result of these objections, there(85) havebeen no scientific research cruises since2009, and none are planned for the immediatefuture.Smetacek suggests that commerce might bethe only way to motivate further research into(90) iron fertilization. Replenishing missing krill, andthe whales it supports, could be the best route tobroader acceptance of the practice.The ocean is no longer a vast, unknowablewilderness. Instead, it’s a viable arena for(95) large-scale manipulation of the planetaryenvironment. We have tamed the heaving, alienworld of the sea and, though doing so can makeus uncomfortable, in the end it might undo a greatdeal of the damage we have already done.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 5–6 (“Its churning . . . ships”)b)Lines 75–84 (“Activists stoked . . . crabs and worms”)c)Lines 90–92 (“Replenishing . . . the practice”)d)Lines 94–96 (“Instead, it’s . . . environment”)Correct answer is option 'D'. 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