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Passage - 2
Most invasive species are neither terribly successful nor very harmful. Britain's invasive plants are not widespread, not spreading especially quickly, and often less of a nuisance than vigorous natives such as bracken. The arrival of new species almost always increases biological diversity in a region; in many cases, a flood of newcomers drives no native species to extinction. One reason is that invaders tend to colonise disturbed habitats like polluted lakes and post-industrial wasteland, where little else lives. They are nature's opportunists.
Q. Which one of the following is the most logical and rational inference that can be made from the above passage?
  • a)
    Invasive species should be used to rehabilitate desert areas and wastelands of a country.
  • b)
    Laws against the introduction of foreign plants are unnecessary.
  • c)
    Sometimes, the campaigns against foreign plants are pointless.
  • d)
    Foreign plants should be used to increase the biodiversity of a country.
Correct answer is option 'A'. Can you explain this answer?
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Passage - 2Most invasive species are neither terribly successful nor v...
Option (d) uses the term “foreign plants” which makes in unsuitable. Same holds for options (b) and (c) too.
Option (d) uses the term “foreign plants” which makes in unsuitable. Same holds for options (b) and (c) too. Hence, option (a) is best, which is correct also as per the passage. Even if we do not use this logic (trick), option (b) is too extreme as in some cases we may need such laws. Option (c) is not the most logical inference (due to “sometimes”). Option (d) seems a strange way to go about it (we should rather protect our own indigenous biodiversity than destroy it). Hence (a) is best.
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Passage - 2Most invasive species are neither terribly successful nor v...
Inference: Invasive species can be used to rehabilitate desert areas and wastelands of a country.

Explanation:

- The passage explains that most invasive species are not very harmful and do not spread quickly.
- It also states that invasive species tend to colonize disturbed habitats like polluted lakes and post-industrial wasteland, where little else lives.
- Therefore, it can be inferred that invasive species could be useful in rehabilitating desert areas and wastelands of a country, where there is little or no vegetation.
- By introducing invasive species in these areas, it may increase biological diversity and help to restore the ecosystem.
- However, it is important to note that invasive species should be carefully selected and monitored to prevent them from becoming harmful to the native species.
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Directions for the following 11 questions:Read the following three passages and solve the items that follow each passage. Your Solutions to these passages should be based on these passages only.PassageIInvasions of exotic species into new geographical areas sometimes occur naturally without human agency. However, human actions have increased this trickle to a flood. Human caused introductions may occur either accidently or as a consequence of human transport, or intentionally but illegally to serve some private purpose or legitimately to procure some hoped-for public benefit by bringing a pest under control, producing new agricultural products or providing novel recreational opportunities. Many introduced species are assimilated into communities without much obvious effect. However some have been responsible for dramatic changes to native species and native communities. For example, the accidental introduction of the brown tree snake, Boiga irregularis into Guam, an island in the pacific, has through nest predation reduced 10 endemic forest bird species to the point of extinction.One of the major reasons for the worlds great biodiversity is the occurrence of centres of endemism so that similar habitats in different parts of the world are occupied by different groups of species that happen it have evolved there. If the species naturally had access to everywhere on the globe, we might expect a relatively small number of successful species to become dominant in each biome. The extent to which this homogenisation can happen naturally is restricted by the limited powers of dispersal of most species in the face of the physical barriers that exist to dispersal. By virtue of the transport opportunities offered by humans, these barriers have been breached by an ever-increasing number of exotic species.The effects of introductions have been to convert a hugely diverse range of local community compositions into something much more homogenous.It would be wrong, however, to conclude that introducing species to a region will inevitably cause a decline in species richness there. For example, there are numerous species of plants, invertebrates and vertebrates found in continental Europe but absent from the British Isles (many because they have so far failed to recolonize after the last glaciations).Their introduction would be likely to augment British biodiversity. The significant detrimental effect noted above arises where aggressive species provide a novel challenge to endemic biotas ill-equipped to deal with them.Q. With reference to the passage, which of the following statements is correct?

PassageIInvasions of exotic species into new geographical areas sometimes occur naturally without human agency. However, human actions have increased this trickle to a flood. Human caused introductions may occur either accidently or as a consequence of human transport, or intentionally but illegally to serve some private purpose or legitimately to procure some hoped-for public benefit by bringing a pest under control, producing new agricultural products or providing novel recreational opportunities. Many introduced species are assimilated into communities without much obvious effect. However some have been responsible for dramatic changes to native species and native communities. For example, the accidental introduction of the brown tree snake, Boiga irregularis into Guam, an island in the pacific, has through nest predation reduced 10 endemic forest bird species to the point of extinction.One of the major reasons for the worlds great biodiversity is the occurrence of centres of endemism so that similar habitats in different parts of the world are occupied by different groups of species that happen it have evolved there. If the species naturally had access to everywhere on the globe, we might expect a relatively small number of successful species to become dominant in each biome. The extent to which this homogenisation can happen naturally is restricted by the limited powers of dispersal of most species in the face of the physical barriers that exist to dispersal. By virtue of the transport opportunities offered by humans, these barriers have been breached by an ever-increasing number of exotic species.The effects of introductions have been to convert a hugely diverse range of local community compositions into something much more homogenous.It would be wrong, however, to conclude that introducing species to a region will inevitably cause a decline in species richness there. For example, there are numerous species of plants, invertebrates and vertebrates found in continental Europe but absent from the British Isles (many because they have so far failed to recolonize after the last glaciations).Their introduction would be likely to augment British biodiversity. The significant detrimental effect noted above arises where aggressive species provide a novel challenge to endemic biotas ill-equipped to deal with them.Q. What can be the impact of invasion of exotic species on an ecosystem?1. Erosion of endemic species.2. Change in the species composition of the community of the ecosystem. Select the correct Solution: using the codes given below

PassageIInvasions of exotic species into new geographical areas sometimes occur naturally without human agency. However, human actions have increased this trickle to a flood. Human caused introductions may occur either accidently or as a consequence of human transport, or intentionally but illegally to serve some private purpose or legitimately to procure some hoped-for public benefit by bringing a pest under control, producing new agricultural products or providing novel recreational opportunities. Many introduced species are assimilated into communities without much obvious effect. However some have been responsible for dramatic changes to native species and native communities. For example, the accidental introduction of the brown tree snake, Boiga irregularis into Guam, an island in the pacific, has through nest predation reduced 10 endemic forest bird species to the point of extinction.One of the major reasons for the worlds great biodiversity is the occurrence of centres of endemism so that similar habitats in different parts of the world are occupied by different groups of species that happen it have evolved there. If the species naturally had access to everywhere on the globe, we might expect a relatively small number of successful species to become dominant in each biome. The extent to which this homogenisation can happen naturally is restricted by the limited powers of dispersal of most species in the face of the physical barriers that exist to dispersal. By virtue of the transport opportunities offered by humans, these barriers have been breached by an ever-increasing number of exotic species.The effects of introductions have been to convert a hugely diverse range of local community compositions into something much more homogenous.It would be wrong, however, to conclude that introducing species to a region will inevitably cause a decline in species richness there. For example, there are numerous species of plants, invertebrates and vertebrates found in continental Europe but absent from the British Isles (many because they have so far failed to recolonize after the last glaciations).Their introduction would be likely to augment British biodiversity. The significant detrimental effect noted above arises where aggressive species provide a novel challenge to endemic biotas ill-equipped to deal with them.Q. How have the human beings influenced the biodiversity?1. By smuggling live organism2. By building highways3. By making ecosystems sensitive so that new species are not allowed4. By ensuring that new species do not have major impact on local species.Which of the statements given above are correct?

PassageIInvasions of exotic species into new geographical areas sometimes occur naturally without human agency. However, human actions have increased this trickle to a flood. Human caused introductions may occur either accidently or as a consequence of human transport, or intentionally but illegally to serve some private purpose or legitimately to procure some hoped-for public benefit by bringing a pest under control, producing new agricultural products or providing novel recreational opportunities. Many introduced species are assimilated into communities without much obvious effect. However some have been responsible for dramatic changes to native species and native communities. For example, the accidental introduction of the brown tree snake, Boiga irregularis into Guam, an island in the pacific, has through nest predation reduced 10 endemic forest bird species to the point of extinction.One of the major reasons for the worlds great biodiversity is the occurrence of centres of endemism so that similar habitats in different parts of the world are occupied by different groups of species that happen it have evolved there. If the species naturally had access to everywhere on the globe, we might expect a relatively small number of successful species to become dominant in each biome. The extent to which this homogenisation can happen naturally is restricted by the limited powers of dispersal of most species in the face of the physical barriers that exist to dispersal. By virtue of the transport opportunities offered by humans, these barriers have been breached by an ever-increasing number of exotic species.The effects of introductions have been to convert a hugely diverse range of local community compositions into something much more homogenous.It would be wrong, however, to conclude that introducing species to a region will inevitably cause a decline in species richness there. For example, there are numerous species of plants, invertebrates and vertebrates found in continental Europe but absent from the British Isles (many because they have so far failed to recolonize after the last glaciations).Their introduction would be likely to augment British biodiversity. The significant detrimental effect noted above arises where aggressive species provide a novel challenge to endemic biotas ill-equipped to deal with them.Q. Why does man introduce exotic species into new geographical areas?1. To bread exotic species with local varieties.2. To increase agricultural productivity.3. for beautification and landscaping.Which of the above statements is/are correct?

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Passage - 2Most invasive species are neither terribly successful nor very harmful. Britains invasive plants are not widespread, not spreading especially quickly, and often less of a nuisance than vigorous natives such as bracken. The arrival of new species almost always increases biological diversity in a region; in many cases, a flood of newcomers drives no native species to extinction. One reason is that invaders tend to colonise disturbed habitats like polluted lakes and post-industrial wasteland, where little else lives. They are natures opportunists.Q. Which one of the following is the most logical and rational inference that can be made from the above passage?a)Invasive species should be used to rehabilitate desert areas and wastelands of a country.b)Laws against the introduction of foreign plants are unnecessary.c)Sometimes, the campaigns against foreign plants are pointless.d)Foreign plants should be used to increase the biodiversity of a country.Correct answer is option 'A'. Can you explain this answer?
Question Description
Passage - 2Most invasive species are neither terribly successful nor very harmful. Britains invasive plants are not widespread, not spreading especially quickly, and often less of a nuisance than vigorous natives such as bracken. The arrival of new species almost always increases biological diversity in a region; in many cases, a flood of newcomers drives no native species to extinction. One reason is that invaders tend to colonise disturbed habitats like polluted lakes and post-industrial wasteland, where little else lives. They are natures opportunists.Q. Which one of the following is the most logical and rational inference that can be made from the above passage?a)Invasive species should be used to rehabilitate desert areas and wastelands of a country.b)Laws against the introduction of foreign plants are unnecessary.c)Sometimes, the campaigns against foreign plants are pointless.d)Foreign plants should be used to increase the biodiversity of a country.Correct answer is option 'A'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Passage - 2Most invasive species are neither terribly successful nor very harmful. Britains invasive plants are not widespread, not spreading especially quickly, and often less of a nuisance than vigorous natives such as bracken. The arrival of new species almost always increases biological diversity in a region; in many cases, a flood of newcomers drives no native species to extinction. One reason is that invaders tend to colonise disturbed habitats like polluted lakes and post-industrial wasteland, where little else lives. They are natures opportunists.Q. Which one of the following is the most logical and rational inference that can be made from the above passage?a)Invasive species should be used to rehabilitate desert areas and wastelands of a country.b)Laws against the introduction of foreign plants are unnecessary.c)Sometimes, the campaigns against foreign plants are pointless.d)Foreign plants should be used to increase the biodiversity of a country.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Passage - 2Most invasive species are neither terribly successful nor very harmful. Britains invasive plants are not widespread, not spreading especially quickly, and often less of a nuisance than vigorous natives such as bracken. The arrival of new species almost always increases biological diversity in a region; in many cases, a flood of newcomers drives no native species to extinction. One reason is that invaders tend to colonise disturbed habitats like polluted lakes and post-industrial wasteland, where little else lives. They are natures opportunists.Q. Which one of the following is the most logical and rational inference that can be made from the above passage?a)Invasive species should be used to rehabilitate desert areas and wastelands of a country.b)Laws against the introduction of foreign plants are unnecessary.c)Sometimes, the campaigns against foreign plants are pointless.d)Foreign plants should be used to increase the biodiversity of a country.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Passage - 2Most invasive species are neither terribly successful nor very harmful. Britains invasive plants are not widespread, not spreading especially quickly, and often less of a nuisance than vigorous natives such as bracken. The arrival of new species almost always increases biological diversity in a region; in many cases, a flood of newcomers drives no native species to extinction. One reason is that invaders tend to colonise disturbed habitats like polluted lakes and post-industrial wasteland, where little else lives. They are natures opportunists.Q. Which one of the following is the most logical and rational inference that can be made from the above passage?a)Invasive species should be used to rehabilitate desert areas and wastelands of a country.b)Laws against the introduction of foreign plants are unnecessary.c)Sometimes, the campaigns against foreign plants are pointless.d)Foreign plants should be used to increase the biodiversity of a country.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for UPSC. Download more important topics, notes, lectures and mock test series for UPSC Exam by signing up for free.
Here you can find the meaning of Passage - 2Most invasive species are neither terribly successful nor very harmful. Britains invasive plants are not widespread, not spreading especially quickly, and often less of a nuisance than vigorous natives such as bracken. The arrival of new species almost always increases biological diversity in a region; in many cases, a flood of newcomers drives no native species to extinction. One reason is that invaders tend to colonise disturbed habitats like polluted lakes and post-industrial wasteland, where little else lives. They are natures opportunists.Q. Which one of the following is the most logical and rational inference that can be made from the above passage?a)Invasive species should be used to rehabilitate desert areas and wastelands of a country.b)Laws against the introduction of foreign plants are unnecessary.c)Sometimes, the campaigns against foreign plants are pointless.d)Foreign plants should be used to increase the biodiversity of a country.Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Passage - 2Most invasive species are neither terribly successful nor very harmful. Britains invasive plants are not widespread, not spreading especially quickly, and often less of a nuisance than vigorous natives such as bracken. The arrival of new species almost always increases biological diversity in a region; in many cases, a flood of newcomers drives no native species to extinction. One reason is that invaders tend to colonise disturbed habitats like polluted lakes and post-industrial wasteland, where little else lives. They are natures opportunists.Q. Which one of the following is the most logical and rational inference that can be made from the above passage?a)Invasive species should be used to rehabilitate desert areas and wastelands of a country.b)Laws against the introduction of foreign plants are unnecessary.c)Sometimes, the campaigns against foreign plants are pointless.d)Foreign plants should be used to increase the biodiversity of a country.Correct answer is option 'A'. Can you explain this answer?, a detailed solution for Passage - 2Most invasive species are neither terribly successful nor very harmful. Britains invasive plants are not widespread, not spreading especially quickly, and often less of a nuisance than vigorous natives such as bracken. The arrival of new species almost always increases biological diversity in a region; in many cases, a flood of newcomers drives no native species to extinction. One reason is that invaders tend to colonise disturbed habitats like polluted lakes and post-industrial wasteland, where little else lives. They are natures opportunists.Q. Which one of the following is the most logical and rational inference that can be made from the above passage?a)Invasive species should be used to rehabilitate desert areas and wastelands of a country.b)Laws against the introduction of foreign plants are unnecessary.c)Sometimes, the campaigns against foreign plants are pointless.d)Foreign plants should be used to increase the biodiversity of a country.Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of Passage - 2Most invasive species are neither terribly successful nor very harmful. Britains invasive plants are not widespread, not spreading especially quickly, and often less of a nuisance than vigorous natives such as bracken. The arrival of new species almost always increases biological diversity in a region; in many cases, a flood of newcomers drives no native species to extinction. One reason is that invaders tend to colonise disturbed habitats like polluted lakes and post-industrial wasteland, where little else lives. They are natures opportunists.Q. Which one of the following is the most logical and rational inference that can be made from the above passage?a)Invasive species should be used to rehabilitate desert areas and wastelands of a country.b)Laws against the introduction of foreign plants are unnecessary.c)Sometimes, the campaigns against foreign plants are pointless.d)Foreign plants should be used to increase the biodiversity of a country.Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Passage - 2Most invasive species are neither terribly successful nor very harmful. Britains invasive plants are not widespread, not spreading especially quickly, and often less of a nuisance than vigorous natives such as bracken. The arrival of new species almost always increases biological diversity in a region; in many cases, a flood of newcomers drives no native species to extinction. One reason is that invaders tend to colonise disturbed habitats like polluted lakes and post-industrial wasteland, where little else lives. They are natures opportunists.Q. Which one of the following is the most logical and rational inference that can be made from the above passage?a)Invasive species should be used to rehabilitate desert areas and wastelands of a country.b)Laws against the introduction of foreign plants are unnecessary.c)Sometimes, the campaigns against foreign plants are pointless.d)Foreign plants should be used to increase the biodiversity of a country.Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice UPSC tests.
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