Question Description
Directions:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: This passage discusses a disease that is detrimental to certain trees in North America.One of the greatest concerns of landscapers is treedisease. Ash trees are among the most common treesin North America, and they are also very susceptible todisease and decline.(5) One cause of decline in ash trees is ash yellows.This disease infects mainly white and green ash inthe Northern United States. Ash yellows is caused bya phytoplasma: virus-like pathogens that are spreadby insects. Ash yellows leads to a gradual decline(10) in tree health for about two to ten years before thetree dies. Some common symptoms include short internodes and tufting of foliage at branch ends, pale greenor pale yellow leaves, defoliation, and a sparse canopy.Cankers may also form on the branches and trunk.(15) Unsightly “witches’ broom” sprouts might appear onthe branches, but it is more common for them to appearon the trunk. The trunk may also develop cracks if thetree is infected with ash yellows. Rarely does an ashtree recover from ash yellows. Experts guess that this(20) disease is more common than most homeowners realizebecause witches’ brooms and yellowing are not alwaysvisible on the infected trees. Sometimes cankers andcracks are the only signs of the disease.The term ash decline is used to refer to a tree with(25) more than one condition. Ash decline may involve theash yellows disease or another problem called verticillium wilt. Ash decline is often used to describe anydecline in health that is unexplainable. Ash declineinvolves branch tip death, defoliation, and a slow(30) decline over a number of years. Trees with ash declinemay appear to recover in the spring and decline againin July and August.Verticillium wilt on ash can also result in cankersand dieback similar to ash yellows. Trying to diagnose(35) a tree is difficult because symptoms could be caused bya variety of problems. Sick ash trees may suffer fromverticillium wilt, ash yellows, environmental stress, ora combination of these ailments.Ash yellows has been a known disease in the(40) United States since the 1930s. However, the diseasewas not distinguished from general ash decline involving environmental factors until the 1980s. In the lasteighty years, North America has seen a significantdecline in some of its ash trees.(45) No single factor has been proven to cause ashdecline. Ash yellows and environmental factors maywork together to create ash decline. Studies show thatash yellows is often detected where environmental factors like water shortage or insect damage are present.(50) A survey of several Midwestern states found that someash decline was found to be independent of ash yellows.The droughts in the 1980s may have caused the declineof ash trees in the Midwest. Cold winter temperaturesmay also play a role in decline.(55) Ash trees are important in the ecology of NorthAmerican forests. The decline of these trees may havea severe impact on the health of other plant and animalcommunities. Green ash provides nesting sites for sev-eral species of birds and other wild creatures. Insects(60) and fish flourish in the cool waters made possible bythe shade of ash trees. Green and white ash are alsovery popular in landscaping. Their decline could resultin reduced property values.Ash trees also represent a valuable hardwood(65) resource. An estimated 275 million feet of ash lum-ber is harvested annually. In the Northeastern UnitedStates, about 33 percent of the commercial forest areaincludes ash trees.There are no known cures for the diseases(70) mentioned. Experts recommend removing very sicktrees while keeping healthy trees well watered and fertilized. Dead limbs should also be removed to maintainthe health of ash trees.Q.According to the passage, many scientists feel that most ash decline is likely caused:a)almost exclusively by ash yellows.b)by a combination of disease and environmental factors.c)by improper watering and fertilization by homeowners.d)by a combination of ash yellows and verticillium wilt only.Correct answer is option 'B'. Can you explain this answer? for ACT 2025 is part of ACT preparation. The Question and answers have been prepared according to the ACT exam syllabus. Information about Directions:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: This passage discusses a disease that is detrimental to certain trees in North America.One of the greatest concerns of landscapers is treedisease. Ash trees are among the most common treesin North America, and they are also very susceptible todisease and decline.(5) One cause of decline in ash trees is ash yellows.This disease infects mainly white and green ash inthe Northern United States. Ash yellows is caused bya phytoplasma: virus-like pathogens that are spreadby insects. Ash yellows leads to a gradual decline(10) in tree health for about two to ten years before thetree dies. Some common symptoms include short internodes and tufting of foliage at branch ends, pale greenor pale yellow leaves, defoliation, and a sparse canopy.Cankers may also form on the branches and trunk.(15) Unsightly “witches’ broom” sprouts might appear onthe branches, but it is more common for them to appearon the trunk. The trunk may also develop cracks if thetree is infected with ash yellows. Rarely does an ashtree recover from ash yellows. Experts guess that this(20) disease is more common than most homeowners realizebecause witches’ brooms and yellowing are not alwaysvisible on the infected trees. Sometimes cankers andcracks are the only signs of the disease.The term ash decline is used to refer to a tree with(25) more than one condition. Ash decline may involve theash yellows disease or another problem called verticillium wilt. Ash decline is often used to describe anydecline in health that is unexplainable. Ash declineinvolves branch tip death, defoliation, and a slow(30) decline over a number of years. Trees with ash declinemay appear to recover in the spring and decline againin July and August.Verticillium wilt on ash can also result in cankersand dieback similar to ash yellows. Trying to diagnose(35) a tree is difficult because symptoms could be caused bya variety of problems. Sick ash trees may suffer fromverticillium wilt, ash yellows, environmental stress, ora combination of these ailments.Ash yellows has been a known disease in the(40) United States since the 1930s. However, the diseasewas not distinguished from general ash decline involving environmental factors until the 1980s. In the lasteighty years, North America has seen a significantdecline in some of its ash trees.(45) No single factor has been proven to cause ashdecline. Ash yellows and environmental factors maywork together to create ash decline. Studies show thatash yellows is often detected where environmental factors like water shortage or insect damage are present.(50) A survey of several Midwestern states found that someash decline was found to be independent of ash yellows.The droughts in the 1980s may have caused the declineof ash trees in the Midwest. Cold winter temperaturesmay also play a role in decline.(55) Ash trees are important in the ecology of NorthAmerican forests. The decline of these trees may havea severe impact on the health of other plant and animalcommunities. Green ash provides nesting sites for sev-eral species of birds and other wild creatures. Insects(60) and fish flourish in the cool waters made possible bythe shade of ash trees. Green and white ash are alsovery popular in landscaping. Their decline could resultin reduced property values.Ash trees also represent a valuable hardwood(65) resource. An estimated 275 million feet of ash lum-ber is harvested annually. In the Northeastern UnitedStates, about 33 percent of the commercial forest areaincludes ash trees.There are no known cures for the diseases(70) mentioned. Experts recommend removing very sicktrees while keeping healthy trees well watered and fertilized. Dead limbs should also be removed to maintainthe health of ash trees.Q.According to the passage, many scientists feel that most ash decline is likely caused:a)almost exclusively by ash yellows.b)by a combination of disease and environmental factors.c)by improper watering and fertilization by homeowners.d)by a combination of ash yellows and verticillium wilt only.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for ACT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: This passage discusses a disease that is detrimental to certain trees in North America.One of the greatest concerns of landscapers is treedisease. Ash trees are among the most common treesin North America, and they are also very susceptible todisease and decline.(5) One cause of decline in ash trees is ash yellows.This disease infects mainly white and green ash inthe Northern United States. Ash yellows is caused bya phytoplasma: virus-like pathogens that are spreadby insects. Ash yellows leads to a gradual decline(10) in tree health for about two to ten years before thetree dies. Some common symptoms include short internodes and tufting of foliage at branch ends, pale greenor pale yellow leaves, defoliation, and a sparse canopy.Cankers may also form on the branches and trunk.(15) Unsightly “witches’ broom” sprouts might appear onthe branches, but it is more common for them to appearon the trunk. The trunk may also develop cracks if thetree is infected with ash yellows. Rarely does an ashtree recover from ash yellows. Experts guess that this(20) disease is more common than most homeowners realizebecause witches’ brooms and yellowing are not alwaysvisible on the infected trees. Sometimes cankers andcracks are the only signs of the disease.The term ash decline is used to refer to a tree with(25) more than one condition. Ash decline may involve theash yellows disease or another problem called verticillium wilt. Ash decline is often used to describe anydecline in health that is unexplainable. Ash declineinvolves branch tip death, defoliation, and a slow(30) decline over a number of years. Trees with ash declinemay appear to recover in the spring and decline againin July and August.Verticillium wilt on ash can also result in cankersand dieback similar to ash yellows. Trying to diagnose(35) a tree is difficult because symptoms could be caused bya variety of problems. Sick ash trees may suffer fromverticillium wilt, ash yellows, environmental stress, ora combination of these ailments.Ash yellows has been a known disease in the(40) United States since the 1930s. However, the diseasewas not distinguished from general ash decline involving environmental factors until the 1980s. In the lasteighty years, North America has seen a significantdecline in some of its ash trees.(45) No single factor has been proven to cause ashdecline. Ash yellows and environmental factors maywork together to create ash decline. Studies show thatash yellows is often detected where environmental factors like water shortage or insect damage are present.(50) A survey of several Midwestern states found that someash decline was found to be independent of ash yellows.The droughts in the 1980s may have caused the declineof ash trees in the Midwest. Cold winter temperaturesmay also play a role in decline.(55) Ash trees are important in the ecology of NorthAmerican forests. The decline of these trees may havea severe impact on the health of other plant and animalcommunities. Green ash provides nesting sites for sev-eral species of birds and other wild creatures. Insects(60) and fish flourish in the cool waters made possible bythe shade of ash trees. Green and white ash are alsovery popular in landscaping. Their decline could resultin reduced property values.Ash trees also represent a valuable hardwood(65) resource. An estimated 275 million feet of ash lum-ber is harvested annually. In the Northeastern UnitedStates, about 33 percent of the commercial forest areaincludes ash trees.There are no known cures for the diseases(70) mentioned. Experts recommend removing very sicktrees while keeping healthy trees well watered and fertilized. Dead limbs should also be removed to maintainthe health of ash trees.Q.According to the passage, many scientists feel that most ash decline is likely caused:a)almost exclusively by ash yellows.b)by a combination of disease and environmental factors.c)by improper watering and fertilization by homeowners.d)by a combination of ash yellows and verticillium wilt only.Correct answer is option 'B'. Can you explain this answer?.

Solutions for Directions:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: This passage discusses a disease that is detrimental to certain trees in North America.One of the greatest concerns of landscapers is treedisease. Ash trees are among the most common treesin North America, and they are also very susceptible todisease and decline.(5) One cause of decline in ash trees is ash yellows.This disease infects mainly white and green ash inthe Northern United States. Ash yellows is caused bya phytoplasma: virus-like pathogens that are spreadby insects. Ash yellows leads to a gradual decline(10) in tree health for about two to ten years before thetree dies. Some common symptoms include short internodes and tufting of foliage at branch ends, pale greenor pale yellow leaves, defoliation, and a sparse canopy.Cankers may also form on the branches and trunk.(15) Unsightly “witches’ broom” sprouts might appear onthe branches, but it is more common for them to appearon the trunk. The trunk may also develop cracks if thetree is infected with ash yellows. Rarely does an ashtree recover from ash yellows. Experts guess that this(20) disease is more common than most homeowners realizebecause witches’ brooms and yellowing are not alwaysvisible on the infected trees. Sometimes cankers andcracks are the only signs of the disease.The term ash decline is used to refer to a tree with(25) more than one condition. Ash decline may involve theash yellows disease or another problem called verticillium wilt. Ash decline is often used to describe anydecline in health that is unexplainable. Ash declineinvolves branch tip death, defoliation, and a slow(30) decline over a number of years. Trees with ash declinemay appear to recover in the spring and decline againin July and August.Verticillium wilt on ash can also result in cankersand dieback similar to ash yellows. Trying to diagnose(35) a tree is difficult because symptoms could be caused bya variety of problems. Sick ash trees may suffer fromverticillium wilt, ash yellows, environmental stress, ora combination of these ailments.Ash yellows has been a known disease in the(40) United States since the 1930s. However, the diseasewas not distinguished from general ash decline involving environmental factors until the 1980s. In the lasteighty years, North America has seen a significantdecline in some of its ash trees.(45) No single factor has been proven to cause ashdecline. Ash yellows and environmental factors maywork together to create ash decline. Studies show thatash yellows is often detected where environmental factors like water shortage or insect damage are present.(50) A survey of several Midwestern states found that someash decline was found to be independent of ash yellows.The droughts in the 1980s may have caused the declineof ash trees in the Midwest. Cold winter temperaturesmay also play a role in decline.(55) Ash trees are important in the ecology of NorthAmerican forests. The decline of these trees may havea severe impact on the health of other plant and animalcommunities. Green ash provides nesting sites for sev-eral species of birds and other wild creatures. Insects(60) and fish flourish in the cool waters made possible bythe shade of ash trees. Green and white ash are alsovery popular in landscaping. Their decline could resultin reduced property values.Ash trees also represent a valuable hardwood(65) resource. An estimated 275 million feet of ash lum-ber is harvested annually. In the Northeastern UnitedStates, about 33 percent of the commercial forest areaincludes ash trees.There are no known cures for the diseases(70) mentioned. Experts recommend removing very sicktrees while keeping healthy trees well watered and fertilized. Dead limbs should also be removed to maintainthe health of ash trees.Q.According to the passage, many scientists feel that most ash decline is likely caused:a)almost exclusively by ash yellows.b)by a combination of disease and environmental factors.c)by improper watering and fertilization by homeowners.d)by a combination of ash yellows and verticillium wilt only.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for ACT. Download more important topics, notes, lectures and mock test series for ACT Exam by signing up for free.

Here you can find the meaning of Directions:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: This passage discusses a disease that is detrimental to certain trees in North America.One of the greatest concerns of landscapers is treedisease. Ash trees are among the most common treesin North America, and they are also very susceptible todisease and decline.(5) One cause of decline in ash trees is ash yellows.This disease infects mainly white and green ash inthe Northern United States. Ash yellows is caused bya phytoplasma: virus-like pathogens that are spreadby insects. Ash yellows leads to a gradual decline(10) in tree health for about two to ten years before thetree dies. Some common symptoms include short internodes and tufting of foliage at branch ends, pale greenor pale yellow leaves, defoliation, and a sparse canopy.Cankers may also form on the branches and trunk.(15) Unsightly “witches’ broom” sprouts might appear onthe branches, but it is more common for them to appearon the trunk. The trunk may also develop cracks if thetree is infected with ash yellows. Rarely does an ashtree recover from ash yellows. Experts guess that this(20) disease is more common than most homeowners realizebecause witches’ brooms and yellowing are not alwaysvisible on the infected trees. Sometimes cankers andcracks are the only signs of the disease.The term ash decline is used to refer to a tree with(25) more than one condition. Ash decline may involve theash yellows disease or another problem called verticillium wilt. Ash decline is often used to describe anydecline in health that is unexplainable. Ash declineinvolves branch tip death, defoliation, and a slow(30) decline over a number of years. Trees with ash declinemay appear to recover in the spring and decline againin July and August.Verticillium wilt on ash can also result in cankersand dieback similar to ash yellows. Trying to diagnose(35) a tree is difficult because symptoms could be caused bya variety of problems. Sick ash trees may suffer fromverticillium wilt, ash yellows, environmental stress, ora combination of these ailments.Ash yellows has been a known disease in the(40) United States since the 1930s. However, the diseasewas not distinguished from general ash decline involving environmental factors until the 1980s. In the lasteighty years, North America has seen a significantdecline in some of its ash trees.(45) No single factor has been proven to cause ashdecline. Ash yellows and environmental factors maywork together to create ash decline. Studies show thatash yellows is often detected where environmental factors like water shortage or insect damage are present.(50) A survey of several Midwestern states found that someash decline was found to be independent of ash yellows.The droughts in the 1980s may have caused the declineof ash trees in the Midwest. Cold winter temperaturesmay also play a role in decline.(55) Ash trees are important in the ecology of NorthAmerican forests. The decline of these trees may havea severe impact on the health of other plant and animalcommunities. Green ash provides nesting sites for sev-eral species of birds and other wild creatures. Insects(60) and fish flourish in the cool waters made possible bythe shade of ash trees. Green and white ash are alsovery popular in landscaping. Their decline could resultin reduced property values.Ash trees also represent a valuable hardwood(65) resource. An estimated 275 million feet of ash lum-ber is harvested annually. In the Northeastern UnitedStates, about 33 percent of the commercial forest areaincludes ash trees.There are no known cures for the diseases(70) mentioned. Experts recommend removing very sicktrees while keeping healthy trees well watered and fertilized. Dead limbs should also be removed to maintainthe health of ash trees.Q.According to the passage, many scientists feel that most ash decline is likely caused:a)almost exclusively by ash yellows.b)by a combination of disease and environmental factors.c)by improper watering and fertilization by homeowners.d)by a combination of ash yellows and verticillium wilt only.Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Directions:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: This passage discusses a disease that is detrimental to certain trees in North America.One of the greatest concerns of landscapers is treedisease. Ash trees are among the most common treesin North America, and they are also very susceptible todisease and decline.(5) One cause of decline in ash trees is ash yellows.This disease infects mainly white and green ash inthe Northern United States. Ash yellows is caused bya phytoplasma: virus-like pathogens that are spreadby insects. Ash yellows leads to a gradual decline(10) in tree health for about two to ten years before thetree dies. Some common symptoms include short internodes and tufting of foliage at branch ends, pale greenor pale yellow leaves, defoliation, and a sparse canopy.Cankers may also form on the branches and trunk.(15) Unsightly “witches’ broom” sprouts might appear onthe branches, but it is more common for them to appearon the trunk. The trunk may also develop cracks if thetree is infected with ash yellows. Rarely does an ashtree recover from ash yellows. Experts guess that this(20) disease is more common than most homeowners realizebecause witches’ brooms and yellowing are not alwaysvisible on the infected trees. Sometimes cankers andcracks are the only signs of the disease.The term ash decline is used to refer to a tree with(25) more than one condition. Ash decline may involve theash yellows disease or another problem called verticillium wilt. Ash decline is often used to describe anydecline in health that is unexplainable. Ash declineinvolves branch tip death, defoliation, and a slow(30) decline over a number of years. Trees with ash declinemay appear to recover in the spring and decline againin July and August.Verticillium wilt on ash can also result in cankersand dieback similar to ash yellows. Trying to diagnose(35) a tree is difficult because symptoms could be caused bya variety of problems. Sick ash trees may suffer fromverticillium wilt, ash yellows, environmental stress, ora combination of these ailments.Ash yellows has been a known disease in the(40) United States since the 1930s. However, the diseasewas not distinguished from general ash decline involving environmental factors until the 1980s. In the lasteighty years, North America has seen a significantdecline in some of its ash trees.(45) No single factor has been proven to cause ashdecline. Ash yellows and environmental factors maywork together to create ash decline. Studies show thatash yellows is often detected where environmental factors like water shortage or insect damage are present.(50) A survey of several Midwestern states found that someash decline was found to be independent of ash yellows.The droughts in the 1980s may have caused the declineof ash trees in the Midwest. Cold winter temperaturesmay also play a role in decline.(55) Ash trees are important in the ecology of NorthAmerican forests. The decline of these trees may havea severe impact on the health of other plant and animalcommunities. Green ash provides nesting sites for sev-eral species of birds and other wild creatures. Insects(60) and fish flourish in the cool waters made possible bythe shade of ash trees. Green and white ash are alsovery popular in landscaping. Their decline could resultin reduced property values.Ash trees also represent a valuable hardwood(65) resource. An estimated 275 million feet of ash lum-ber is harvested annually. In the Northeastern UnitedStates, about 33 percent of the commercial forest areaincludes ash trees.There are no known cures for the diseases(70) mentioned. Experts recommend removing very sicktrees while keeping healthy trees well watered and fertilized. Dead limbs should also be removed to maintainthe health of ash trees.Q.According to the passage, many scientists feel that most ash decline is likely caused:a)almost exclusively by ash yellows.b)by a combination of disease and environmental factors.c)by improper watering and fertilization by homeowners.d)by a combination of ash yellows and verticillium wilt only.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Directions:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: This passage discusses a disease that is detrimental to certain trees in North America.One of the greatest concerns of landscapers is treedisease. Ash trees are among the most common treesin North America, and they are also very susceptible todisease and decline.(5) One cause of decline in ash trees is ash yellows.This disease infects mainly white and green ash inthe Northern United States. Ash yellows is caused bya phytoplasma: virus-like pathogens that are spreadby insects. Ash yellows leads to a gradual decline(10) in tree health for about two to ten years before thetree dies. Some common symptoms include short internodes and tufting of foliage at branch ends, pale greenor pale yellow leaves, defoliation, and a sparse canopy.Cankers may also form on the branches and trunk.(15) Unsightly “witches’ broom” sprouts might appear onthe branches, but it is more common for them to appearon the trunk. The trunk may also develop cracks if thetree is infected with ash yellows. Rarely does an ashtree recover from ash yellows. Experts guess that this(20) disease is more common than most homeowners realizebecause witches’ brooms and yellowing are not alwaysvisible on the infected trees. Sometimes cankers andcracks are the only signs of the disease.The term ash decline is used to refer to a tree with(25) more than one condition. Ash decline may involve theash yellows disease or another problem called verticillium wilt. Ash decline is often used to describe anydecline in health that is unexplainable. Ash declineinvolves branch tip death, defoliation, and a slow(30) decline over a number of years. Trees with ash declinemay appear to recover in the spring and decline againin July and August.Verticillium wilt on ash can also result in cankersand dieback similar to ash yellows. Trying to diagnose(35) a tree is difficult because symptoms could be caused bya variety of problems. Sick ash trees may suffer fromverticillium wilt, ash yellows, environmental stress, ora combination of these ailments.Ash yellows has been a known disease in the(40) United States since the 1930s. However, the diseasewas not distinguished from general ash decline involving environmental factors until the 1980s. In the lasteighty years, North America has seen a significantdecline in some of its ash trees.(45) No single factor has been proven to cause ashdecline. Ash yellows and environmental factors maywork together to create ash decline. Studies show thatash yellows is often detected where environmental factors like water shortage or insect damage are present.(50) A survey of several Midwestern states found that someash decline was found to be independent of ash yellows.The droughts in the 1980s may have caused the declineof ash trees in the Midwest. Cold winter temperaturesmay also play a role in decline.(55) Ash trees are important in the ecology of NorthAmerican forests. The decline of these trees may havea severe impact on the health of other plant and animalcommunities. Green ash provides nesting sites for sev-eral species of birds and other wild creatures. Insects(60) and fish flourish in the cool waters made possible bythe shade of ash trees. Green and white ash are alsovery popular in landscaping. Their decline could resultin reduced property values.Ash trees also represent a valuable hardwood(65) resource. An estimated 275 million feet of ash lum-ber is harvested annually. In the Northeastern UnitedStates, about 33 percent of the commercial forest areaincludes ash trees.There are no known cures for the diseases(70) mentioned. Experts recommend removing very sicktrees while keeping healthy trees well watered and fertilized. Dead limbs should also be removed to maintainthe health of ash trees.Q.According to the passage, many scientists feel that most ash decline is likely caused:a)almost exclusively by ash yellows.b)by a combination of disease and environmental factors.c)by improper watering and fertilization by homeowners.d)by a combination of ash yellows and verticillium wilt only.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Directions:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: This passage discusses a disease that is detrimental to certain trees in North America.One of the greatest concerns of landscapers is treedisease. Ash trees are among the most common treesin North America, and they are also very susceptible todisease and decline.(5) One cause of decline in ash trees is ash yellows.This disease infects mainly white and green ash inthe Northern United States. Ash yellows is caused bya phytoplasma: virus-like pathogens that are spreadby insects. Ash yellows leads to a gradual decline(10) in tree health for about two to ten years before thetree dies. Some common symptoms include short internodes and tufting of foliage at branch ends, pale greenor pale yellow leaves, defoliation, and a sparse canopy.Cankers may also form on the branches and trunk.(15) Unsightly “witches’ broom” sprouts might appear onthe branches, but it is more common for them to appearon the trunk. The trunk may also develop cracks if thetree is infected with ash yellows. Rarely does an ashtree recover from ash yellows. Experts guess that this(20) disease is more common than most homeowners realizebecause witches’ brooms and yellowing are not alwaysvisible on the infected trees. Sometimes cankers andcracks are the only signs of the disease.The term ash decline is used to refer to a tree with(25) more than one condition. Ash decline may involve theash yellows disease or another problem called verticillium wilt. Ash decline is often used to describe anydecline in health that is unexplainable. Ash declineinvolves branch tip death, defoliation, and a slow(30) decline over a number of years. Trees with ash declinemay appear to recover in the spring and decline againin July and August.Verticillium wilt on ash can also result in cankersand dieback similar to ash yellows. Trying to diagnose(35) a tree is difficult because symptoms could be caused bya variety of problems. Sick ash trees may suffer fromverticillium wilt, ash yellows, environmental stress, ora combination of these ailments.Ash yellows has been a known disease in the(40) United States since the 1930s. However, the diseasewas not distinguished from general ash decline involving environmental factors until the 1980s. In the lasteighty years, North America has seen a significantdecline in some of its ash trees.(45) No single factor has been proven to cause ashdecline. Ash yellows and environmental factors maywork together to create ash decline. Studies show thatash yellows is often detected where environmental factors like water shortage or insect damage are present.(50) A survey of several Midwestern states found that someash decline was found to be independent of ash yellows.The droughts in the 1980s may have caused the declineof ash trees in the Midwest. Cold winter temperaturesmay also play a role in decline.(55) Ash trees are important in the ecology of NorthAmerican forests. The decline of these trees may havea severe impact on the health of other plant and animalcommunities. Green ash provides nesting sites for sev-eral species of birds and other wild creatures. Insects(60) and fish flourish in the cool waters made possible bythe shade of ash trees. Green and white ash are alsovery popular in landscaping. Their decline could resultin reduced property values.Ash trees also represent a valuable hardwood(65) resource. An estimated 275 million feet of ash lum-ber is harvested annually. In the Northeastern UnitedStates, about 33 percent of the commercial forest areaincludes ash trees.There are no known cures for the diseases(70) mentioned. Experts recommend removing very sicktrees while keeping healthy trees well watered and fertilized. Dead limbs should also be removed to maintainthe health of ash trees.Q.According to the passage, many scientists feel that most ash decline is likely caused:a)almost exclusively by ash yellows.b)by a combination of disease and environmental factors.c)by improper watering and fertilization by homeowners.d)by a combination of ash yellows and verticillium wilt only.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Directions:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: This passage discusses a disease that is detrimental to certain trees in North America.One of the greatest concerns of landscapers is treedisease. Ash trees are among the most common treesin North America, and they are also very susceptible todisease and decline.(5) One cause of decline in ash trees is ash yellows.This disease infects mainly white and green ash inthe Northern United States. Ash yellows is caused bya phytoplasma: virus-like pathogens that are spreadby insects. Ash yellows leads to a gradual decline(10) in tree health for about two to ten years before thetree dies. Some common symptoms include short internodes and tufting of foliage at branch ends, pale greenor pale yellow leaves, defoliation, and a sparse canopy.Cankers may also form on the branches and trunk.(15) Unsightly “witches’ broom” sprouts might appear onthe branches, but it is more common for them to appearon the trunk. The trunk may also develop cracks if thetree is infected with ash yellows. Rarely does an ashtree recover from ash yellows. Experts guess that this(20) disease is more common than most homeowners realizebecause witches’ brooms and yellowing are not alwaysvisible on the infected trees. Sometimes cankers andcracks are the only signs of the disease.The term ash decline is used to refer to a tree with(25) more than one condition. Ash decline may involve theash yellows disease or another problem called verticillium wilt. Ash decline is often used to describe anydecline in health that is unexplainable. Ash declineinvolves branch tip death, defoliation, and a slow(30) decline over a number of years. Trees with ash declinemay appear to recover in the spring and decline againin July and August.Verticillium wilt on ash can also result in cankersand dieback similar to ash yellows. Trying to diagnose(35) a tree is difficult because symptoms could be caused bya variety of problems. Sick ash trees may suffer fromverticillium wilt, ash yellows, environmental stress, ora combination of these ailments.Ash yellows has been a known disease in the(40) United States since the 1930s. However, the diseasewas not distinguished from general ash decline involving environmental factors until the 1980s. In the lasteighty years, North America has seen a significantdecline in some of its ash trees.(45) No single factor has been proven to cause ashdecline. Ash yellows and environmental factors maywork together to create ash decline. Studies show thatash yellows is often detected where environmental factors like water shortage or insect damage are present.(50) A survey of several Midwestern states found that someash decline was found to be independent of ash yellows.The droughts in the 1980s may have caused the declineof ash trees in the Midwest. Cold winter temperaturesmay also play a role in decline.(55) Ash trees are important in the ecology of NorthAmerican forests. The decline of these trees may havea severe impact on the health of other plant and animalcommunities. Green ash provides nesting sites for sev-eral species of birds and other wild creatures. Insects(60) and fish flourish in the cool waters made possible bythe shade of ash trees. Green and white ash are alsovery popular in landscaping. Their decline could resultin reduced property values.Ash trees also represent a valuable hardwood(65) resource. An estimated 275 million feet of ash lum-ber is harvested annually. In the Northeastern UnitedStates, about 33 percent of the commercial forest areaincludes ash trees.There are no known cures for the diseases(70) mentioned. Experts recommend removing very sicktrees while keeping healthy trees well watered and fertilized. Dead limbs should also be removed to maintainthe health of ash trees.Q.According to the passage, many scientists feel that most ash decline is likely caused:a)almost exclusively by ash yellows.b)by a combination of disease and environmental factors.c)by improper watering and fertilization by homeowners.d)by a combination of ash yellows and verticillium wilt only.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice ACT tests.