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

The plants which can withstand with narrow and broad range of temperature tolerance respectively are:

1. monothermal and stenothermal

2. stenothermal and monothermal

3. stenothermal and eurythermal

4. stenothermal and mesothermal

I. Organisms living in oceans, lakes, and rivers face water-related problems.
II. Euryhaline can tolerate a wide range of salinities
III. Stenohaline are restricted to a narrow range of salinities
IV. No freshwater animals cannot live for long in seawater but sea animals can live in freshwater for a long time because of osmotic balance
V. The salt concentration (measured as salinity in parts per thousand), is less than 5 in inland water, 30-35 in the sea, and >100 in some hypersaline lagoons.
(1) All are correct                     

(2) All are false

(3) Only IV is wrong                 

(4) Only I, III, V are correct

Which of the following is best suited with the abiotic factor temperature, playing role in changes in the physicochemical environment of different habitats?

1. The average temperature of land is approximately 50 throughout the year

2. The temperature of temperate countries is very much favorable for mango trees

3. Temperature affects the kinetics of enzyme and hence the basal metabolic activity of the body

4. Both 1 and 2