Question

Shark is eurythermal while polar bear is stenothermal. What is the advantage the former has and what is the constraint the later has ?

Answer 1

-Shark tolerates wide range of temperature so wide spread/survives in all waters while polar bear-restricted in narrow range of temperature so constraint to live in very cold icy environment.

Answer 2

Sharks being eurythermal can tolerate wide range of temperature variations and thus have wider distribution on earth, on the other hand polar bear being stenothermal can tolerate only narrow range of temperature and is restricted to specific regions only.