Study the following statements and select the correct ones.
(i) Organisms capable to tolerate a wide range of temperature are called stenothermal organisms.
(ii) Thermal tolerance of different species determine their grographical distribution to a large extent
(iii) Avarge temperature in tropical deserts in summer is `lt 50^(@)C`.
(iv) Thermal springs cannot sustain life due to very high average temperature i.e., `gt 100^(@)C`.

Options

A. (i) only
B. (ii) only
C. (i),(ii) and (iii)
D. (i),(iii) and (iv)

Answer

B

Explanation

The geographical distribution of different species of organisms depends on their thermal tolerance. Organisms which can tolerate a wide range of temperature variations, e.g., most mammals and birds are called eurythermal organisms. The average temperature in tropical deserts in summer is more than `50^(@)C`. Thermal springs can sustain life, whera average temperature excess `100^(@)C` i.e., may microorganisms (e.g., some archaebacteria) live there.