Tag: biodiversity loss and need for conservation
Questions Related to biodiversity loss and need for conservation
The extinction and disappearance of some species is because of the _____
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Destruction of habitats
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Planting of trees
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Preservation of forest
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Prevention of overgrazing
The extinction and disappearance of some species from planet take place due to the destruction of their natural habitat, poaching and killing habits. Whereas, planting of more trees (afforestation), preservation of forests and prevention of overgrazing causes conservation of natural habitat thereby saving the species from extinction.
The main reason for extinction of species is
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Hunting
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Destruction of habitat
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Pollution
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None of the above
Habitat destruction is the process in which the organisms that previously used the site are displaced or destroyed, reducing biodiversity. Habitat destruction is the greatest contributor to the extinction of many species. This destruction is ongoing in both terrestrial and aquatic biomes, with approximately 80% of all extinctions being attributed to human caused habitat destruction. Terrestrially the destruction includes forests, deserts and grasslands, but the latter may account for the greatest losses due to the agricultural and urban conversion.
Which one of the following may be the reason for extinction of plant species due to human activities?
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Earthquakes
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Pollution
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Diseases
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Evolution
Extinction is the end of an organism or of a group of organisms, normally a species. Humans cause extinction of a species through over harvesting, pollution, habitat destruction, invasion of invasive species, over hunting and other influences. Although, earthquakes and diseases are the results of human activities but it does not cause any extinction of plant species.
Which of the following is the main reason for extinction of animals?
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Predation
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Pollution
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Destruction of habitat
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Felling of trees
Destruction of habitat is the process in which natural habitat is rendered unable to support the species that lived in it. Increasing urbanization and industrialization has resulted in encroachment of forest areas leading to destruction of habitat. As a result, the natural flora and fauna have been endangered and some have become extinct. Thus the correct answer is option C.
Polar bears are just one species whose biodiversity has been affected by human activities Which of these is the greatest threat to the polar bears?
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Melting ice due to global warming
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Organic pollutants
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Habitat destruction
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Human encroachment
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Habitat fragmentation
Polar bears are found in arctic region where the ice caps are present and temperature is quite low. Hence, melting ice due to global warming is the greatest threat to the biodiversity of polar bears.
Anthropogenic extinction means the extinction of species from surface of Earth, that is due to
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Change in season
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Effects of meteors
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Human activities
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None of the above
Which of the following is responsible for the extinction of wildlife?
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Hunting
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Destruction of habitats
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Pollution of air and water
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All of the above
The important causes of biodiversity losses or species extinctions, that the world is facing now, are largely due to human activities. There are four major causes -
(i) Habitat loss and fragmentation (includes deforestation and pollution).
(ii) Over-exploitation (includes hunting, fishing and other such activities).
(iii) Alien species invasions.
(iv) Co-extinctions.
The factor that destroys plant biodiversity is
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Biosphere reserves
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Vulnerable ecosystems
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Inaccessibility of habitats
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Destruction of habitats
The factor that destroys plant biodiversity is destruction of habitats, wildlife species get extinct because of destruction of forest by deforestation.
Extinction of numerous wild animals is due to
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Hunting
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Deforestation
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Overcrowding
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Scarcity of food
Deforestation refers to destruction of forest by extensive cutting of trees, since wild animals live in forests, they lose their habitat which leads to extinction of species
Bald Eagle had been at high risk of extinction due to its
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Large size
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Low reproductive potential
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High trophic level
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Change in migratory route