Q. No.Regarding the gradients of biodiversity:
I:
As we move from poles to the equator, broadly speaking, biodiversity decreases.
II:
There is an increase in species diversity from lower to higher altitudes.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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Plants are an important source of medicines for human use. Identify the incorrectly matched pair:
|
|
PLANT |
MEDICINE |
|
1. |
Taxusbrevifolia |
Anticancer drug |
|
2. |
Cinchona officinalis |
Anti-malarial |
|
3. |
Rauwolfiaserpentina |
Anti-hypertensive |
|
4. |
Catharanthusroseus |
Anti-helminthic |
The pink headed duck has got extinct mainly due to:
1. Habitat destruction
2. Overexploitation
3. Alien invasion
4. Pollution
Identify the correct statements regarding the “EDGE” species:
I. They are the only survivor members of their genus or even higher taxon.
II. To increase their conservation many are designated as “focal” species
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
The ‘Himalayan Quail’ got extinct due to:
1. Habitat destruction
2. Overexploitation
3. Alien invasion
4. Pollution
A bird that was previously thought to be extinct till its rediscovery in 1986 by Bharat Bhushan of Bombay Natural History Society is:
1. Great Indian Bustard
2. Jerdon’s Courser
3. White Peacock
4. Siberian crane
The type of species that will most likely be supported by small parks will be:
| 1. | k - selected species | 2. | r - selected species |
| 3. | climax species | 4. | species with small niches |
Destruction of all tropical rainforests will lead to the extinction of approximately what percent of species found on the earth?
1. 10
2. 20
3. 50
4. 90
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Fishes can be killed by acid rain due to the release of:
1. aluminum ions
2. carbon monoxide
3. anticoagulants
4. mercury
Which of the following is a biocide that was first to be used on a large scale?
| 1. | DDT | 2. | 2,4-D |
| 3. | Mercury | 4. | Methane |
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