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All Physics Chemistry Botany Zoology

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Which of the following cannot be the reason for the stability of biological community?

A. More species B. Not much variations in productivity C. Resistant to occasional disturbances made by nature only D. Resilient to occasional disturbances made by nature and man

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Explanation

15.1 Biodiversity

Page number-263

15.1.3 The Importance of Species Diversity to the Ecosystem

Biodiversity and Conservation

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Who among the following gave tentative answers to the question that how do the attributes of stable community are related are linked to the species richness in a community?

A. Paul Ehrlich B. David Tilman C. A V. Hamboldt D. Edward Wilson

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Explanation

15.1 Biodiversity

Page number-263

15.1.3 The Importance of Species Diversity to the Ecosystem

Biodiversity and Conservation

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Which of the following is not an attribute of stable community?

A. Resistant to occasional disturbances B. Resistant to invasions by alien species C. Resilient to occasional disturbances D. High productivity with great variation year to year

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Explanation

15.1 Biodiversity

Page number-263

15.1.3 The Importance of Species Diversity to the Ecosystem

Biodiversity and Conservation

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Rich biodiversity is not important for

A. Healthy ecosystem B. Survival of human race on this planet C. Alien species D. Both A and B

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Explanation

15.1 Biodiversity

Page number-263

15.1.3 The Importance of Species Diversity to the Ecosystem

Biodiversity and Conservation

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David Tilman actually proposed that

A. The long term ecosystem experiments using out door plots with less species showed less year to year variation in total number B. The long term ecosystem experiments using out door plots with more species showed less year to year variation in total biomass C. The long term ecosystem experiments using out door plots with more species showed more year to year variation in total number D. The long term ecosystem experiments using indoor plots with less species showed less year to year variation in total biomass

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Explanation

15.1 Biodiversity

Page number-263

15.1.3 The Importance of Species Diversity to the Ecosystem

Biodiversity and Conservation

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According to Rivet Popper Hypothesis, which of the following is not correct?

A. Airplane: ecosystem B. Rivets: species C. Popping a rivet: causing a species to become extinct D. Flight safety: number of species

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Explanation

15.1 Biodiversity

Page number-263

15.1.3 The Importance of Species Diversity to the Ecosystem

Biodiversity and Conservation

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Which of the following loss of rivet will be more crucial for the flight safety?

A. Loss of rivets on the wings B. Loss of rivets on the seats C. Loss of rivets on Windows inside the plane D. Both A and C

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Explanation

15.1 Biodiversity

Page number-263

15.1.3 The Importance of Species Diversity to the Ecosystem

Biodiversity and Conservation

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Which of the following is not correct according to analogy given by Paul Ehrlich?

A. Loss of the key species that drive the major ecosystem functions is a more serious threat to flight safety than loss of other less important species B. Proper functioning of ecosystem is initially may not be affected by species loss C. Over a period of time, if the species loss is continuous, the ecosystem gets affected after a time D. Even the loss of not much significant species lead to crtical damage to ecosystem.

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Explanation

15.1 Biodiversity

Page number-263

15.1.3 The Importance of Species Diversity to the Ecosystem

Biodiversity and Conservation

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Which of the following data is not according to IUCN Red List (2004)?

A. Vertebrates-338 B. Invertebrates-359 C. Plants-87 D. Bacteria-104

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Explanation

15.1 Biodiversity

Page number-263

15.1.4 Loss of Biodiversity

Biodiversity and Conservation

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The extinctions of 784 species recorded in IUCN Red List (2004) happened over

A. Last 240 years B. Last 500 years C. Last 300 years D. Last 400 years

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Explanation

15.1 Biodiversity

Page number-263

15.1.4 Loss of Biodiversity

Biodiversity and Conservation

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