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

(1) More species

(2) Not much variations in productivity

(3) Resistant to occasional disturbances made by nature only

(4) Resilient to occasional disturbances made by nature and man

Subtopic:  Importance of Biodiversity |
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Rich biodiversity is not important for

(1) Healthy ecosystem

(2) Survival of human race on this planet

(3) Alien species

(4) Both (1) and (2)

Subtopic:  Importance of Biodiversity |
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Paul Ehrlich

Which of the following is wrong about him?

(1) Stanford Ecologist

(2) Rivet Popper Hypothesis

(3) Importance of species actually affects the extent of stability of ecosystem

(4) Worked on Outdoor plots for the apology he proposed

Subtopic:  Importance of Biodiversity |
 76%
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David Tilman actually proposed that

1. The long term ecosystem experiments using out door plots with less species showed less year to year variation in total number
2. The long term ecosystem experiments using out door plots with more species showed less year to year variation in total biomass
3. The long term ecosystem experiments using out door plots with more species showed more year to year variation in total number
4. The long term ecosystem experiments using indoor plots with less species showed less year to year variation in total biomass
Subtopic:  Importance of Biodiversity |
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According to Rivet Popper Hypothesis, which of the following is not correct?

1. Airplane: ecosystem

2. Rivets: species

3. Popping a rivet: causing a species to become extinct

4. Flight safety: number of species

Subtopic:  Importance of Biodiversity |
 85%
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Which of the following loss of rivet will be more crucial for the flight safety?

(1) Loss of rivets on the wings

(2) Loss of rivets on the seats

(3) Loss of rivets on Windows inside the plane

(4) Both A and C

Subtopic:  Importance of Biodiversity |
 75%
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Which of the following is not correct according to analogy given by Paul Ehrlich?

(1) 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

(2) Proper functioning of ecosystem is initially may not be affected by species loss

(3) Over a period of time, if the species loss is continuous, the ecosystem gets affected after a time

(4) Even the loss of not much significant species lead to critical damage to ecosystem.

Subtopic:  Importance of Biodiversity |
 65%
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Which of the following statement is/are correct?
a. As we move on Earth from low to high latitude, the
biodiversity increases.
b. In rivet popper hypothesis given by Paul Ehrlich,
rivets on the wings are considered as key species.
c. India possesses 8.1% species diversity of the world.

1. b and c only 
2. b only
3. All a, b and c 
4. a and c only

Subtopic:  Importance of Biodiversity |
 76%
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Which of the following statements are true?

l. Species diversity provides stability to the ecosystem.

ll. Communities with more species tend to the more stable than those with less species.

lll. Ecosystems with higher biodiversity are more productive than ecosystems with lower biodiversity

lV. Biodiversity is not essential for the maintenance and health of ecosystems.

 Choose the correct option:-

1. l, ll and lll

2. l, ll and lV

3. ll, lll and lV

4. l, ll, lll and lV

Subtopic:  Importance of Biodiversity |
 89%
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