Question

Q.Read the passage and answer the following questions
1.The extinction of species, that is, our flora and fauna is nothing new for the planet, but the rate of
extinction has increased at an alarming pace Sadly, we have played a major role in the process. It has been
estimated that some 50,000 plants and animal species will become extinct every year in the coming decades.The loss of insects and microorganisms can be calculated. The destruction of our eco-system is so alarming that is many is 60,000 plant species are expected to be lost by the year 2025.
2. However, according to the Centre for Biological Diversity, Unlike past mass extinctions caused by events like asteroid strikes , volcanic eurption natural climate shifts, the current crisis is almost entirely caused by us humans. Ninety-nine per cent of currently threatened species are at risk from human activities, primarilythose driving habitat loss, introduction of exotic species and global warming.'
3. The habitats are often destroyed because of destructive change to environments. These could either be attributed to natural phenomena such as floods, volcanoes and hurricanes or human activities such as construction, deforestation, changing land use for agriculture and artificial land drainage. Hunting and poaching of rare plants and animals is a significant cause of extinction and represents a major or dominant factor in the decline of certain species. One such example of man's callousness can be seen in the Nilgiris, once a peaceful haunt of a large herd of pachyderms, and which is now fast becoming a hunting ground. The forest areas of Gudlur and Mudumalai, which once resounded with elephants tramping in the undergrowth, are now witnessing the mindless slaughter of these gentle giants.
4. The introduction of plant and animal species that are not native to a given area may upset the balance of the local ecosystein. Pollution is yet another cause of extinction and may impact entire ecosystems. For example,
the pesticide DDT had a catastrophic impact on our ecology. The spread of disease may be both a natural and human factor behind the extinction of species.
Questions
1. Why is the extinction of species a cause for alarm?
2. How did extinction take place earlier?
3. How is the next mass extinction likely to happen?
4. What kinds of activities threaten species?
5. What are the two factors that can cause habitat loss?

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Answer 1

1.the rate of

extinction has increased at an alarming pace.

2.past mass extinctions caused by events like asteroid strikes , volcanic eurption natural climate shifts, the current crisis is almost entirely caused by humans.

3.These could either be attributed to natural phenomena such as floods, volcanoes and hurricanes or human activities such as construction, deforestation, changing land use for agriculture and artificial land drainage. Hunting and poaching of rare plants and animals is a significant cause of extinction and represents a major or dominant factor in the decline of certain species.

4.Pollution is yet another cause of extinction and may impact entire ecosystems.The spread of disease may be both a natural and human factor behind the extinction of species.

5.Ninety-nine per cent of currently threatened species are at risk from human activities, primarilythose driving habitat loss,The habitats are often destroyed because of destructive change to environments.

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Answer 2

Answer:

• Question 1.
• The species—our flora or fauna—is now getting extinct at an alarming rate because of humans. It has been estimated that some 50,000 plants and animal species will become extinct every year in the coming decades. The loss of insects and micro-organisms cannot be calculated. The destruction of our eco-system is so alarming that as many as 60,000 plant species are expected to be lost by the year 2025.
• Question 2.
• Extinction took place due to events like asteroid strikes, volcanic eruptions and natural climate shifts.
• Question 3.
• Mass extinction is likely to happen because of humans. Ninety-nine per cent of currently threatened species are at risk from human activities, primarily those driving habitat loss, introduction of exotic species and global warming.
• Question 4.
• Human activities such as construction, deforestation, changing landuse for agriculture and artificial land drainage threaten species. Moreover, hunting and poaching of rare plants and animals is also a significant cause of extinction that may represent a major or dominant factor in the decline of certain species.
• Question 5.
• The habitats are often destroyed because of destructive change to environments. These could either be attributed to natural phenomena such as floods, volcanoes, hurricanes, etc. or human activities such as construction, deforestation, changing land use for agriculture and artificial land drainage