why can't a polar bear live in hot weather?
608965
It's like why you can't live in extreme cold weather. Your body isn't designed for it.
177760
they must be born in the spring, since they sleep all winter long?\nI'm not sure, depends on what bear are we talking about.
738759
The frog is a cold blooded or poikilothermal animal whose body temperature rises or falls with that of environmental temperature. \n       The frog can not live in a very hot or very cold environment as the enzyme functioning in there body is hampering out, because in low temperature the enzyme are become in active and at high temperature it become denature due to its thermolabile in nature. Because of these reason, frog needs moist shady environment during summer and lie in an inactive form in the deep layer of soil during winter.
595210
The bear from Alaska would dissolve faster in the water, because it would most likely be a POLAR bear!!!
278416
The North Pole is constitued of ice, unlike the South Pole, there is no land mass underneath the ice.  Global warming causes the ice sheets to melt and break apart.  If a polar bear is on one of these ice sheets that breaks up it has to swim back to a larger, more substantial area to live.  But what is happening is that the bears are drowning before they can reach another ice sheet.
477562
The cold temperature didn't allow the plant to perform its basic bodily functions.
875511
Polar bears are much bigger than tigers. On an avarage, a polar bear is 5 ft taller than a tiger. Besides both are predetors, so both has killer moves up their sleeve. So I would imagine the polar bear has some advantage. Now the question is where would the duel take place? Tigers are used to warmer climates, polar bears may be in trouble there. On the other hand, if the fight is held at the polar bear's domain in the poles, the tiger would be shaking too much in cold to put up a decent fight.
436147
Hybernation is a particular form of torpor, a state of reduced metabolism and low activity.  In this the body temperature of the animal drops almost to ambient temperature but periodically spikes up to its normal value.  The reason is indeed to preserve energy in a time when food resources are scarce.  Bears thereby can survive on a very low metabolic rate.  This way they can manage to spend the winter months without having to find the otherwise needed amount of food.\n\nFootnote:  It is NOT a state of sleep these animals are in, but indeed a state of extremely reduced metabolism and activity.  Different from other forms of torpor is here that the animal's body temp now and then spikes up, in other word, that the animal now and then indeed metabolizes.\n\nHope that helps.
521871
I know polar bears are adapting to the warmer climate by getting darker/thinner fur but I don't think they are becoming extinct.
617001
There are some people that aren't designed for cold places and there are also people who can't tolerate hot places. A coat with good insulation and with a hood might help.
165508
Both the huskie and polar bear have fur that is made to keep them warm in cold weather. Both can become uncomfortable and possibly overheat if the weather is not cool enough. They are made to be in the cold and removing them from that situation is rather cruel to the animal. The huskie has adapted to humans, becoming a pet and work animal while the bear is more an equal if not slightly higher. \nI am basing this on a Nature special about polar bears on PBS.
428545
I know polar bears only live in the north pole. There isn't any life in the south pole.
613867
As is typical, loss of habitat is the greatest concern for AT as well as other special biomes.  For example, the polar bear has a yearly cycle in northern Manitoba and Ontario, in which it goes out onto the ice cover of the Hudson Bay in the fall to hunt, and returns in the winter- Recently, the freeze/thaw cycles have changed, and many of the bears are starving or being trapped on the ice.  Efforts are being made now to provide food and chase them off the early-thawing ice with helicopters, but obviously if the trend continues, it's likely a losing effort.  If the challenge is changing weather patterns, there isn't very much we can do, other than try to minimize the climate changes.  Other challenges include development of the area, especially for oil and coal exploration, which might seriously disrupt migration patterns of the large prey animals.  In general, though, the arctic tundra is not among the most threatened habitats, and so is not focused on as much as, for example, wetlands, rainforests, and coral reefs.
319227
Polar bears are found only in the northern hemisphere
653475
The answer IS NOT pressure. Pressure has nothing to do with temperatures at the north pole, or why polar bears are white!\n\nThe right answer is "NO"!\n\nSources:\nhttp://fun.egreetingsetc.com/2F/D/AI/index.shtml\nhttp://teensetc.com/0F/0D/BI/index.shtml\nhttp://phunpages.com/1F/D/AI/index.shtml
539885
If polar bears had the opportunity to eat penguins, I'm quite sure they would. The reason they don't is because polar bears and penguins live a long distance apart. Polar bears live in Arctic regions of North America, Europe and Asia, whereas penguins live in the southern hemisphere. Some books imply that all penguins live in Antarctica. This is not true - in fact, only two species (the Adelie and emperor penguins) breed on Antarctica. Several species of penguins live around South America, South Africa, Australia and New Zealand and the Galapagos penguins live on the Galapgos islands (surprise!), which are on the equator. This is still a long way from the Arctic. \n\nThe problem about polar bears and penguins relates to many Christmas cards etc, which show polar animals living together, when, in fact, they don't. \n\nI hope that this answers your question. \n\nAll the best \n\nHaley
901989
This is a myth. Polar bears are observed using either paw, though I would suppose there are " lefties " and " righties ". They do not cover their noses when hunting, either.