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Botany MCQs for NEET — Practice Questions with Answers

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More than …a…..was the time period during which …b….mass extinction has taken place

A. a- more than three billion years B. a- more than 4.5 billion years C. b- six extinctions D. Both A and C

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Explanation

15.1 Biodiversity

Page number-264

15.1.4 Loss of Biodiversity

Biodiversity and Conservation

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Sixth Extinction presently in progress is different from the previous episodes by some reasons except

A. Difference in the rates B. Current rate is 100-1000 times faster than previous episodes C. Human intrusions D. Extinction of special bird species

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Explanation

15.1 Biodiversity

Page number-264

15.1.4 Loss of Biodiversity

Biodiversity and Conservation

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Which of the following can be an alarming consequence of sixth extinction?

A. Nearly half of all the species on Earth can be wiped out within the next 100 years B. Nearly one fourth of all the species on Earth can be wiped out within 200 years C. Nearly one eighth of all the species on Earth can be wiped out within 100 years D. Nearly one third of all the species on Earth can be wiped out within 200 years

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Explanation

15.1 Biodiversity

Page number-264

15.1.4 Loss of Biodiversity

Biodiversity and Conservation

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Which of the following is not a result of loss of biodiversity?

A. Decline in plant production B. Lowered resistance to environmental perturbations such as drought C. Increased variability in certain ecosystem processes such as Plant Productivity D. Decreased variability in certain ecosystem processes such as pest and disease cycle

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Explanation

15.1 Biodiversity

Page number-264

15.1.4 Loss of Biodiversity

Biodiversity and Conservation

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Which of the following is not a part of Evil Quartet?

A. Habitat loss and Fragmentation B. Dosage compensation C. Alien Species Invasions D. Co-extinctions

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Explanation

15.1 Biodiversity

Page number-264

15.1.4 Loss of Biodiversity

Biodiversity and Conservation

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The most important cause driving animals and plants to extinction in the Evil Quartet is

A. Habitat loss and Fragmentation B. Over-Exploitation C. Alien Species Invasions D. Co-extinctions

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Explanation

15.1 Biodiversity

Page number-264

15.1.4 Loss of Biodiversity

Biodiversity and Conservation

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Which of the following give the most dramatic examples of habitat loss?

A. Tropical Rain forest B. Temperate Deciduous forest C. Temperate Evergreen forest D. Grasslands

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Explanation

15.1 Biodiversity

Page number-264

15.1.4 Loss of Biodiversity

Biodiversity and Conservation

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Once covering more than ……. of the Earth's land surface, these rain forests now cover no more than……

A. 17,10 B. 14,6 C. 12,4 D. 7,3

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Explanation

15.1 Biodiversity

Page number-264

15.1.4 Loss of Biodiversity

Biodiversity and Conservation

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Which of the following is not correct about Fragmentation?

A. Large habitats are broken up into small fragments due to various human activities B. Mammals and birds are affected by fragmentation as they need large territory C. Certain animals with migratory habits are badly affected leading to population decline D. The main reason for the cause of fragmentation is soya bean cultivation

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Explanation

15.1 Biodiversity

Page number-264

15.1.4 Loss of Biodiversity

Biodiversity and Conservation

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Which of the following is wrong information about consequence of Alien Species Invasions?

A. Nile Perch - Alien Species B. Lake Victoria in East Africa - the ecosystem in which h alien species was introduced C. Cichlid fish: Extincted species D. Number of extincted species: 176

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Explanation

Page number-265

15.1.4 Loss of Biodiversity

15.1 Biodiversity

Biodiversity and Conservation

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