Q. No.A species facing extremely high risk of extinction in the immediate future is called:
1. Vulnerable
2. Endemic
3. Critically Endangered
4. Extinct
Given below are three statements (A-E) each with one or two blanks. Select the option which correctly fills up the blanks.
Statements:
| A. | The tropics (between _____I_____) harbour more species than temperate and polar regions. |
| B. | For example, Columbia situated near _____II_____, has about 1400 species of birds, while New York (41°N) has 105 species, Greenland (71°N) has about 56 species and India (in the equator region) has _____III_____ species. |
| C. | The number of species of vascular plants in tropics is about _____IV_____ times more of that of temperate forests. |
| D. | The _____V_____ rain forest in Brazil, South America has the greatest biodiversity on earth. |
| E. | Since the origin of life on earth and evolution, there have been five episodes of mass extinction, but the current rate of extinction (6 mass extinction - due to human activities) is _____VI_____ times faster than them, due to human activities: |
Options:
| 1. | I - 0°N to 90°S, II - equator, III - 1200, IV - five, V - Amazonian, VI - 100 - 1000 |
| 2. | I - 23.5°N to 23.5°S, II - equator, III - 10000, IV - ten, V - Amazonian, VI - 100 - 1000 |
| 3. | I - 23.5°N to 23.5°S, II - equator, III - 1200, IV - ten, V - Amazonian, VI - 100 -1000 |
| 4. | I - 23.5°N to 23.5°S, II - equator, III - 1200, IV - ten, V - Amazonian, VI - 100 - 10000 |
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
Global species diversity and land area covered by India with respect to world is:
1. 12%, 7%
2. 2.4%, 9%
3. 8.1%, 2.4%
4. 4%, 3%
Which one the following is false about Habitat loss and fragmentation?
| 1. | This is the most important cause driving animals and plants to extinction |
| 2. | The most dramatic examples of habitat loss come from temperate rainforests |
| 3. | Once covering more than 14% of the earth's land surface, rain forests now cover no more than 6 percent. |
| 4. | The Amazon rainforest harbouring probably millions of species is being cut and cleared for cultivating soya beans or for conversion to grassland for raising beef cattle |
| Column -I | Column II | ||
| I. | Silent valley | A. | Kaziranga |
| II. | Rhinoceros | B. | Bandipur |
| III. | Tiger project in Karnataka | C. | In situ |
| IV. | National Park | D. | Tropical evergreen forest |
1. I - B, II - A, III - D, IV - C
2. I - D, II - A, III - B, IV - C
3. I - A, II - C, III - B, IV - D
4. I - B, II - A, III - C, IV - D
The exotic species, introduced in India for its flower and leaf is:
1. Lantana
2. Water Hyacinth (Eicchornia)
3. Parthenium
4. All are correct
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 |
Ex situ strategies include:
A. Botanical garden
B. Zoos
C. Seed / Pollen banks
D. Gene bank and tissue culture
1. A, B
2. A, B, C
3. B, C, D
4. A, B, C, D
In situ strategies include-
| A. | Biosphere reserve |
| B. | National park |
| C. | Wildlife sanctuaries |
| D. | Sacred forests / lakes |
2. A, B, C
3. B, C, D
4. A, B, C, D
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