Homeostasis is
1. tendency to change with change in environment
2. tendency to resist change
3 disturbance in regulatory control
4. plants and animals extracts used in homeopathy
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Identify the biome that is not correctly matched with the physical parameters given in corresponding Column II and Column III:
Biome | Mean annual temperature | Mean annual precipitation [cm] | |
1. | Tropical forest | 20-25 | 130 - 430 |
2. | Arctic and alpine tundra | -12 - 2 | 10 -125 |
3. | Coniferous forest | -5 - 5 | 100 -200 |
4. | Temperature forest | 8-22 | 50 - 225 |
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The most ecologically relevant environmental factor is:
1. Temperature
2. Water
3. Light
4. Soil
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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 expected for any species
4. Shift to marine water from land
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Many freshwater animals cannot live for long in sea water and vice versa because of:
1. Buoyancy related problems
2. Lack of impermeable skins
3. Thermolabile enzymes
4. Osmotic considerations
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Under unfavorable conditions, many zooplankton species in lakes and ponds are known to enter a stage of suspended development called as:
1. Dormancy
2. Hibernation
3. Aestivation
4. Diapause
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The given age pyramid represents a:
1. Fast expanding population
2. Slowly expanding population
3. Stable population
4. Declining population
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Darwinian fitness is represented by:
1. Low r value
2. High r value
3. High K value
4. Low K value
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Under a particular set of selection pressures, organisms evolve towards the most efficient:
1. Thermoregulation
2. Water conservation
3. Respiration
4. Reproduction strategy
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A population interaction where one species is harmed whereas the other is unaffected is called as:
(a) Mutualism
(b) Competition
(c) Predation
(d) Amensalism
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