list four adaptations shown by polar bear to live in polar region
Answers
Answer:
thick layers of fat and fur - for insulation against the cold. a small surface area to volume ratio - to minimise heat loss. a greasy coat that sheds water after swimming - to help reduce heat loss. large feet - to distribute their load and increase grip on the ice.
Answer:
1) Bears are insulated with two layers of fur and a thick layer of body fat. This provides enough insulation that their body temperature and metabolic rate doesn’t change, even when temperatures reach -37 C (-34 F).
2) On bitterly cold days with fierce winds, polar bears dig shelter pits in snow banks and curl up in a tight ball. Sometimes they cover their muzzles—which radiate heat—with their thickly furred paws and let the snow drift around and over them.
3) Polar bears have more problems with overheating than they do with cold. That's why they typically walk at a leisurely pace. They can quickly overheat when they run.
4) Polar bears are strong swimmers and divers, a characteristic that allows them to swim from one ice floe to the next. But there’s a limit to how far they can swim. Long swims are especially dangerous to young cubs.