Which of the following are the extinctions caused by over-exploitation for the last 500 years?

(1) Steller's Sea cow

(2) Passenger Pigeon

(3) Dodo

(4) Both (1) and (2)

Subtopic:  Loss of Biodiversity |
 90%
From NCERT
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Which of the following is wrong information about the consequences of Alien Species Invasions?

1. Nile Perch - Alien Species
2. Lake Victoria in East Africa - the ecosystem in which alien species was introduced
3. Cichlid fish: extinct species
4. Number of extinct species: 176
Subtopic:  Loss of Biodiversity |
 84%
From NCERT
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Which of the following is not an example of Alien species for our ecosystems?

(1) Carrot Grass

(2) Indigenous catfishes

(3) Lantana

(4) Eichhornia

Subtopic:  Loss of Biodiversity |
 86%
From NCERT
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The recent illegal introduction of the African catfish……..for aquaculture purposes is posing a threat to the indigenous catfishes of our Rivers

(1) Clarius gariepinus

(2) Cichlid fishes

(3) Parthenium

(4) Steller's Sea cow

Subtopic:  Loss of Biodiversity |
 82%
From NCERT
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Which of the following is not an example of Co-extinctions?

(1) Plant-pollinator mutualism

(2) Host-parasite extinction

(3) Plant-animal species in an obligatory relationship

(4) Fragmentation in Amazon Rain Forests and Species of mammals

Subtopic:  Loss of Biodiversity |
 83%
From NCERT
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Which of the following is not a narrowly utilitarian reasons for the conservation of Biodiversity?

(1) Direct economic benefits like cereals, pulses and Fruits

(2) Firewood, Fibre, construction material

(3) Tannins, lubricants, dyes, resins, perfumes

(4) Oxygen, Aesthetic Pleasure

Subtopic:  In Situ Conservation of Biodiversity |
 84%
From NCERT
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How much Oxygen does Amazon Forest is estimated to produce through photosynthesis?

(1) 20 per cent of the total oxygen in the Earth's atmosphere

(2) 30 per cent of the total oxygen in the Earth's atmosphere

(3) 40 per cent of the total oxygen in the Earth's atmosphere

(4) 60 per cent of the total oxygen in the Earth's atmosphere

Subtopic:  In Situ Conservation of Biodiversity |
 84%
From NCERT
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Which of the following is not categorized under broadly utilitarian reasons of biodiversity?

(1) Oxygen

(2) Pollination

(3) Intangible benefits like walking through thick woods

(4) Tannins, lubricants, Perfumes

Subtopic:  In Situ Conservation of Biodiversity |
 75%
From NCERT
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More than…a…. of the drugs currently sold in the market worldwide are derived from plants and …b…...species of plants contribute to the traditional medicines used by native people around the world.

(1) a- 25 per cent

(2) b-12000

(3) a- 30 per cent

(4) a- 39 per cent

Subtopic:  In Situ Conservation of Biodiversity |
 87%
From NCERT
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Which of the following is an intangible benefits obtained from biodiversity?

(1) Aesthetic Pleasure walking through thick woods

(2) Watching spring flowers in full bloom

(3) Waking up to a Bulbul's song in the morning

(4) All of these

Subtopic:  In Situ Conservation of Biodiversity |
 95%
From NCERT
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