When a threatened plant needs urgent measures to save it from extinction, the desirable approach is:
1. | in-situ conservation | 2. | ex-situ conservation |
3. | cryopreservation | 4. | biopreservation |
Biodiversity should be conserved as it plays a major role in many ecosystem services that nature provides. Such an argument is called:
1. | broadly utilitarian | 2. | narrowly utilitarian |
3. | ethical | 4. | moral |
The search for previously unknown compounds in organisms that have never been used in traditional medicine is known as:
1. | Biopiracy | 2. | Bioprospecting |
3. | Molecular pharming | 4. | Bioremediation |
What percentage of total oxygen in the earth’s atmosphere is produced by Amazon rainforest through photosynthesis?
1. | 50 | 2. | 40 |
3. | 30 | 4. | 20 |
Extinction of Stellar’s sea cow and passenger pigeon was due to:
1. | Habitat loss and fragmentation | 2. | Over exploitation |
3. | Invasion of alien species | 4. | Co-extinctions |
Loss of biodiversity may lead to all except:
1. | decline in plant production |
2. | increased resistance to environmental perturbance |
3. | increased variability in water use |
4. | increased variability in pest and disease cycle |
Which group, amongst the following, has the maximum percentage of species facing threat of extinction?
1. | Amphibians | 2. | Birds |
3. | Mammals | 4. | Gymnosperms |
Which of the following species of tiger has not gone extinct?
1. | Bali | 2. | Javan |
3. | Caspian | 4. | Siberian |
Which of the following is not a reason that accounts for greater biodiversity of tropics?
1. | availability of more solar energy |
2. | more niche specialization |
3. | more time for species diversification |
4. | large seasonal variations in environmental factors |
Although, India has only 2.4 % of world’s area, its share of global species diversity is about:
1. | 3% | 2. | 5% |
3. | 8% | 4. | 11% |