Question

Study the following statement 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 determines their geographical distribution to a large extent.
(iii) The average temperature in tropical deserts in summer is $<{50}^{0}C.$
(iv) Thermal springs cannot sustain life due to the very high average temperature i.e., $>{100}^{0}C.$

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

Answer 1

The correct option is B (ii) only

The geographical distributions of different species of organisms depends on their thermal tolerance. Organisms which can tolerate a wide range of temperature variation ,e.g. most mammals and birds are called eurythermal organisms. The average temperature in tropical deserts in summer is more than500C . Thermal springs can sustain, where average temperature exceed 100Ci.e.,many microorganisms (e.g. some archaebacteria) live there.

So, the correct answer is '(ii) only'.