Their hair insulates their bodies. Due to small surface area,it reduces the energy loss through their skin. If they have a thick layer of fat, this will build up under the skin, keeping them warm.
Polar bears have hollow hair. Each hair is a clear hollow tube which reflects the light, making polar bears' fur appear white, though each hair is actually transparent. Alpacas have hollow hair. They are indigenous to the Andes mountains and live in sub-zero climate. To accomodate this they have hollow hair to insulate and keep them warm. Similarly, llama have hair with a hollow core fibre. Hollow hair, in fact, is an adaptation of animals which live in very cold climates. Reindeer, or caribour, also have soft hollow hairs, densely packed together.
Being cold can in fact cause leg hair to grow faster. Along with any other hair that is shaved and then returns. This is because when cold, the body and all things in it regenerate faster to produce or accumulate heat.
Temperate climate. You have many organism variation; some very hairy, some hirsute. Climate gets very cold. Those very hairy organism can survive long enough to reproduce and give their progeny their hairy traits. Thus the hairy mate with the hairy and the variation is more on the hairy side, so hair is selected for in this cold and immediate environment.
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A humid climate is characterized by high levels of water vapor in the air. It typically experiences high temperatures and high levels of humidity, which can lead to muggy conditions. Humid climates are often associated with heavy rainfall and lush vegetation.
They survive in different habitats. Animals with hair can survive in cold and warm places, and animals without hair survive in warm places.
Most aquatic animals living in cold climates can survive quite nicely thanks to their adaptations. Some animals have hair and others like whales have a tremendous amount of blubber that helps to insulate them from cold temperatures.
Caribou may use their antlers in times of dire need. To survive their cold, harsh climate, the use the layer of thick hair/fur.
How often you should wash your hair in a cold climate depends on your hair's natural greasiness and how comfortable you are with it. You should wash it whenever you feel like it is too greasy.
When the temperature is cold, the hair and fur on animals fluffs up, creating air pockets between hairs that insulate the body from the cold.
Freezing cold climate for example the snowy hair has long and fluffy hair to stay warm in the cold brutal winters
The long hair will help insulate the animal from the Sun's heat during the day, and keep it warm during the freezing cold of the night. Most deserts' climate is usually either very hot or very cold.
they have a tiny bit of hair which helps them stand the water. They are born in cold water too.
Hollow hair and fat
Purely genetics... Not only the hair is long, it is thicker and in realy cold klimats are holow with air traped inside.
No. Some animals which live in the Arctic and very cold climates do have hollow hair. These include reindeer (caribour), polar bears, llamas and alpacas, but not the Arctic hair.
Cold-blooded animals cannot regulate their own body temeprature and rely on the climate around them to keep them warm. Warm-blooded animals can regualte their own body temperature. Thats why a snake ( which is cold-blooded) is more active under a heat lamp than if he had none. That's why you will see mammals out in the snow sometimes and not snakes. Mammals have hair of some sort and cold blooded most of the times don't.