Question

Which of the following options is correct?
Stenothermal organism, Eurythermal organism
A) Frog, Lizard
B) Frog, Man
C) Man, Lizard
D) Polar bear, coconut tree

Answer 1

Stenotherms are living organisms which are only capable of surviving within a narrow range of temperature. Eurythermal are organisms that can survive and function at wide ranges of different temperatures.

Complete answer:
Most organisms are well adapted to their specific habitats. Although, there are some which can survive fluctuations in temperature and can exist almost anywhere on Earth, e.g. dog, man, goats, etc.
But certain other animals can survive only in a specific temperature range and cannot survive everywhere. For example - most of the reptiles, polar bears, penguins, etc.
Option A: Frog, Lizard - Since, both of these are stenothermal, therefore this option is incorrect.
Option B: Frog, Man - Since frog is stenothermal as it can and Man is eurythermal as it can survive in a wide range of temperature, this is the correct option.
Option C: Man, Lizard - SInce Man is eurythermal and Lizards are Stenothermal, this option is incorrect.
Option D: Polar bear, coconut tree - Since, both of these are stenothermal, this option is incorrect.

Thus, the correct option is (B) Frog, Man.

Note: The organisms that are restricted to a specific range of latitudes, are described as stenothermal. Stenotherms can be of these types -
Thermophilic animals can survive only at high temperatures, usually more than 20°C.
Cryophilic animals can survive only at low temperatures, in some cases, even as low as 0°C.