Q. No.The most ecologically relevant environmental factor is:
1.
Temperature
2.
Water
3.
Light
4.
Soil
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The extent of geographical distribution for eurythermals and stenothermals is expected to be:
1. Equal for both
2. Larger for the former
3. Smaller for the former
4. Cannot be predicted
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If global warming continues, how would the distributional range of some species be affected?
1. There will be a poleward shift
2. There will be an equatorial shift
3. No change is expected for any species
4. There will be shift from land to marine water
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The salt concentration [measured as salinity in parts per thousand] for inland waters is:
1. Less than 5
2. Between 5 and 15
3. 30 – 35
4. More than 100
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Organisms that are tolerant for a wide range of salinity are called:
| 1. | Stenohalines | 2. | Euryhalines |
| 3. | Halophytes | 4. | Stenothermals |
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Small plants [herbs and shrubs], growing in forests, are usually adapted to photosynthesize optimally under:
1.Very high light conditions
2.Very low water conditions
3.Very high water conditions
4.Very low light conditions
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Photoperiod affects:
1. Plants only
2. Animals only
3. Both plants and animals
4. Neither plants nor animals
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Which of the following algae is likely to be found in the deepest waters?
1.Green
2.Brown
3.Red
4.All are found at equal depths
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Thermoregulation and osmoregulation can be achieved by all:
1. Amniotes
2. Birds and mammals
3. Vertebrates
4. Chordates and insects
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When exposed to cold temperatures, which of the following is responsible for maintaining constant body temperature in humans?
1. Vasoconstriction and shivering
2. Vasodilation and shivering
3. Vasodilation and sweating
4. Vasoconstriction and sweating
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