Year-to-year variation shown by areas with more species is ................... with respect to areas with less species.
1. | less | 2. | more |
3. | same | 4. | absent |
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The rivet popper hypothesis was given by:
1. | Humboldt | 2. | Ehlrich |
3. | Tilman | 4. | Tansley |
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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 |
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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% |
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Approximately, what number of species have been identified, named and studied?
1. | 1.0 million | 2. | 1.5 million |
3. | 1.7 million | 4. | 2.0 million |
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The greatest biodiversity on the earth is found in:
1. | African grasslands |
2. | Amazonian rain forest in South America |
3. | Western Ghats in India |
4. | Nile delta in Egypt |
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The relation between species richness and area for a wide variety of taxa on alogarithmic scale is a:
1. | rectangular hyperbola | 2. | straight line |
3. | sigmoid curve | 4. | circular circle |
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The total number of biodiversity hotspots in the world is:
1. | 25 | 2. | 17 |
3. | 34 | 4. | 51 |
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Biodiversity loss is now one of the world’s most pressing crisis. The primary reason for this is that:
1. | we cannot do anything about it |
2. | we are not responsible for this loss |
3. | we still do not know its entire extent |
4. | it is only affecting the developing countries |
Between community, diversity is known as:
1. | alpha diversity | 2. | beta diversity |
3. | gamma diversity | 4. | delta diversity |