The Earth Summit was held in Rio do Janeiro in:
1. | 1987 | 2. | 1990 |
3. | 1992 | 4. | 2002 |
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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 |
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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 |
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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 |
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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 |
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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
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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 |
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What exotic introduction is threatening indigenous catfishes in our rivers?
1. | Carassius auratus | 2. | Carcinus maenas |
3. | Centaurea solstitialis | 4. | Clarias gariepinus |
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Introduction of Lates niloticus led to the extinction of:
1. | Gambusia | 2. | Pupfish |
3. | Cichlid fish | 4. | Chinook salmon |
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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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