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
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. | Temperate forest | 8-22 | 50 - 225 |
The most ecologically relevant environmental factor is:
1. Temperature
2. Water
3. Light
4. Soil
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
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
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
The given age pyramid represents a:
1. Fast expanding population
2. Slowly expanding population
3. Stable population
4. Declining population
Darwinian fitness is represented by:
1. Low r value
2. High r value
3. High K value
4. Low K value
Under a particular set of selection pressures, organisms evolve towards the most efficient:
1. Thermoregulation
2. Water conservation
3. Respiration
4. Reproduction strategy
A population interaction where one species is harmed whereas the other is unaffected is called as:
(1) Mutualism
(2) Competition
(3) Predation
(4) Amensalism