Biodiversity and Conservation · Question 17

Among ‘The Evil Quartet’, which one is considered the most important cause driving extinction of species?

1. Over exploitation for economic gain
2. Alien species invasions
3. Co-extinctions
4. Habitat loss and fragmentation

The historic Convention on Biological Diversity, ‘The Earth Summit’ was held in Rio de Janeiro in the year

1. 1992
2. 1986
3. 2002
4. 1985

Which of the following is not a method of ex situ conservation?

1. In vitro fertilization
2. National Parks
3. Micropropagation
4. Cryopreservation

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