Biodiversity and Conservation · Question 20

Habitat loss and fragmentation, over-exploitation, alien species invasion and co-extinction are causes for :

1. Population explosion
2. Competition
3. Biodiversity loss
4. Natality

In-situ conservation refers to :

1. Protect and conserve the whole ecosystem
2. Conserve only high-risk species
3. Conserve only endangered species
4. Conserve only extinct species

Give the correct descending order of organisms with reference to their estimated number found in Amazon forest. Choose the correct answer from the options given below :

1. B > A > C > E > D
2. A > B > E > D > C
3. A > C > D > B > E
4. B > A > E > D > C

The World Summit on sustainable development held in 2002 in Johannesburg, South Africa pledged for

1. Collection and preservation of seeds of different genetic strains of commercially important plants.
2. A significant reduction in the current rate of biodiversity loss.
3. Declaration of more biodiversity hotspots.
4. Increase in agricultural production.

Match the List-I with List-II : Choose the correct answer from the options given below :

1. (a) – (iv), (b) – (iii), (c) – (ii), (d) – (i)
2. (a) – (iv), (b) – (iii), (c) – (i), (d) – (ii)
3. (a) – (ii), (b) – (iv), (c) – (i), (d) – (iii)
4. (a) – (iv), (b) – (i), (c) – (ii), (d) – (iii)

Frugivorous birds are found in large numbers in tropical forests mainly because of :

1. Temperature conducive for their breeding
2. Lack of niche specialisation
3. Higher annual rainfall
4. Availability of fruits throughout the year

Western Ghats have a large number of plants and animal species that are not found anywhere else. Which of the following term is used to notify such species?

1. Vulnerable species
2. Threatened species
3. Keystone species
4. Endemic species

According to Robert May, the global species diversity is about

1. 7 million
2. 20 million
3. 1.5 million
4. 50 million

Which of the following regions of the globe exhibits highest species diversity?

1. Amazon forests
2. Madagascar
3. Western Ghats of India
4. Himalayas

The Earth summit held in Rio de Janeiro in 1992 was called :

1. to assess threat posed to native species by invasive weed species
2. for immediate steps to discontinue use of CFCs that were damaging the ozone layer
3. to reduce CO2 emissions and global warming
4. for conservation of biodiversity and sustainable utilization of its benefits