Biology - Organisms and Populations Question with Solution | TestHub

Organisms that can tolerate and thrive in a wide range of temperatures are called eurythermal.

Organisms that are restricted to a narrow range of temperatures are called stenothermal.

Since polar bears are restricted to a narrow range of temperature, they are stenothermal.

Euryhaline and stenohaline refer to tolerance to wide and narrow ranges of salinity, respectively.

Answer: Stenothermal