Q. No.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
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
The relation between species richness and area for a wide variety of taxa on a logarithmic scale is a:
1. rectangular hyperbola
2. straight line
3. sigmoid curve
4. sine curve
Alexander von Humbolt described for the first time
(1) ecological biodiversity
(2) law of limiting factor
(3) species area relationships
(4) population growth equation
Which part of the world has a high density of organism?
(1) Deciduous forests
(2) Grasslands
(3) Tropical rain forests
(4) Savannahs
Select the correct statement about biodiversity.
| 1. | The desert area of Rajasthan and Gujarat have a very high level of desert animals. |
| 2. | Large scale planting of Bt cotton has no adverse effect on biodiversity |
| 3. | Western Ghats have a very high degree of species richness and endemism |
| 4. | Conservation of biodiversity is just a fad pursued by the developed countries. |
Which of the following rain forest is home to more than 40,000 species of plants, 3,000 of fishes, 1,300 of birds, 427 of mammals, 427 of amphibians, 378 of reptiles and more than 1,25,000 invertebrates?
(1) Amazonian
(2) Tropical
(3) Arctic tundra
(4) Temperate
According to the concept of species area relations:
| 1. | The number of species in an area increases with the size of the area |
| 2. | Larger species require larger habitat areas than do smaller species |
| 3. | Most species within any given area are endemic |
| 4. | The larger the area, the greater the extinction rate |
The great German naturalist and geographer Alexander von Humboldt observed that within a region species richness increased with increasing explored area, but only up to a limit. In fact, relation between species richness and area for a wide variety of taxa (angiosperm plants, birds, bats, freshwater fishes) turns out to be a rectangular hyperbola. Now find out correct equations shown in the graph:
1. I - S = CAZ; II - Log S = log C + Z log A
2. I - Log S = log C + Z log A; II - S = CAZ
3. I - S = CAZ + log C; II - Log S = log C + Z log A
4. I - S = CAZ + log A; II - Log S = log C + Z log A
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