Q. No.The agricultural practice of producing or growing a single crop, plant or livestock species, variety, or breed in a field or farming system at a time is called as:
1. Monoculture
2. Polyculture
3. Oligoculture
4. Agriculture
1. Monoculture
2. Polyculture
3. Oligoculture
4. Agriculture
The reasons to store seeds in a seed bank include all except:
1. To have available the genes that plant breeders need to increase yield, disease resistance, drought tolerance, nutritional quality, taste, etc. of crops.
2. To forestall loss of genetic diversity in rare plant species in an effort to conserve biodiversity ex-situ.
3. To preserve the historical and cultural value of plants not grown now.
4. To guard against biopiracy by limiting the use of seeds only in certain areas.
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Recalcitrant seeds are:
1. seeds that do not survive drying and freezing during ex-situ conservation
2. seeds that can resist the effects of drying or temperatures less than 10 °C
3. can be stored for long periods
4. terminator seeds
Freezable specimens that can be preserved with cryopreservation include all except:
| 1. | Semen | 2. | Seeds |
| 3. | Early embryos | 4. | Human heart |
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Which of the following continents has the highest biodiversity?
| 1. | South America | 2. | Africa |
| 3. | Europe | 4. | Asia |
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Which of the following is not a cause for the loss of biodiversity?
1. Destruction of habitat
2. Invasion by alien species
3. Keeping animals in zoological parks
4. Over-exploitation of natural resources
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Which of the following is not an invasive alien species in the Indian context?
| 1. | Lantana | 2. | Cynodon |
| 3. | Parthenium | 4. | Eichhornia |
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Where among the following will you find pitcher plants?
| 1. | Rain forest of North-East India | 2. | Sunderbans |
| 3. | Thar desert | 4. | Western ghats |
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Which one of the following is not a major characteristic feature of biodiversity hotspots?
1. A large number of species
2. Abundance of endemic species
3. Mostly located in the tropics
4. Mostly located in the polar regions
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