• Subject:


  • Topic:

    Organisms and Populations

Homeostasis is 
(a) tendency to change with change in environment
(b) tendency to resist change
(c) disturbance in regulatory control
(d) 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:

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

Which of the following algae is likely to be found in the deepest waters?

(a) Green

(b) Brown

(c) Red

(d) All are found at equal depths

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

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