Q. No.
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 |
The most important cause of the loss of biodiversity today is the:
1. Habitat loss and fragmentation
2. Overexploitation
3. Alien species invasion
4. Co-extinctions
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 |
What exotic introduction is threatening indigenous catfishes in our rivers?
| 1. | Carassius auratus | 2. | Carcinus maenas |
| 3. | Centaurea solstitialis | 4. | Clarias gariepinus |
Introduction of Lates niloticus led to the extinction of:
| 1. | Gambusia | 2. | Pupfish |
| 3. | Cichlid fish | 4. | Chinook salmon |
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 |
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