Question
Shark is eurythermal while polar bear is stenothermal. What is the advantage the former has and what is the constraint the later has?
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Answer
A few organisms can tolerate and thrive in wide range of temperature (they are called eurythermal), but a vast majority of them are restricted to narrow range of temperatures (such organisms are called stenothermal). The levels of thermal tolerance of different species determine to a large extent their geographical distribution.
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