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Why doesn't the color of a polar bear's fur change?
it does change colour. Polar bears have fur that is made up of "hollow guard hairs." Sometimes when polar bears live in zoos that are in a warmer climate, they can have algae growing inside the hollow guard hairs of their fur. This makes them have a greenish tint to their fur. These hollow hairs also keep their hair from matting down when they swim in water. owned.
Of what is a polar bear made?
Polar Bears have fur that is made up of "Hollow Guard Hairs". Now don't ask me what that is.......cause I coppied this answer off somewhere.
Do border collies have hollow hair?
No. Labradors do not have hollow hairs. Animals such as caribou (reindeer), llamas, alpacas and polar bears - all of which live in cold climates - have hollow hairs.
What is an advantage for having hollow hair?
Polar bears have hollow hairs which trap the little heat there is and bring it closer to the skin and make the polar bear warmer.
What are the top guard hairs on a ferret?
These are long longer, wirey hairs of the outer coat. Usually, they are darker in color compared to the softer, finer undercoat.
How does a polar bears their fur keep them warm?
Polar bears have transparent fur over black skin. Reflection of the sunlight from the densely packed transparent hairs makes polar bears seem to be white. The bears' black skin absorbs heat from the sun. The transparent fur is made up of hollow hairs called guard hairs. These air-filled guard hairs help transmit heat from the sunlight to the polar bear's black skin as a solar heat collector. In turn, the reflection stops the heat being lost from their black skin.As well as this, polar bears have a thick layer of blubber, or insulating fat, which can be up to 11 cm thick. Their fur is also waterproof, so it helps keep the bears warmer when they are in water.With their high cold temperatures at the North Pole.
What are adapatations of a wolf?
Grey Wolves have wooly coats to provide insulation and long guard hairs to keep out moisture.
Do hedgehogs have sharp prickles?
Yes. The spines are hollow hairs made stiff with keratin (structural proteins). They aren't poisonous or anything, but they are sharp.
What special feature does a polar bear have?
A wonderful white appearing furry coat to blend in with the scenery so no one can shoot it from a plane! The fur is special because it is really not white but each hair is actually the almost transparent milky color of the keratin the hair is made from without any added pigments. The color of the hair is similar to the color of your finger nails since they are also made of keratin. The light reflections from the hairs of the fur make it appear white. Each of the longer guard hairs in their fur is also unique because they are hollow. This allows some amount of sun to reach their black skin that absorbs the heat. The air-filled hollow hairs also provide important insulation from the cold temperatures, keeping cold air out and warmth in.
What animals have hollow hair?
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.
How can polar bears look white when they have black skin?
A polar bear's skin is black. The fur reflects light, making the polar bear appear white to us (the fur is actually somewhat transparent).A polar bear's skin is black so it can soak up as much of the sun's rays as possible. Polar bears have almost transparent fur over black skin. Reflection of the sunlight from the densely packed transparent hairs makes polar bears seem to be white. The bears' black skin absorbs heat from the sun. The seemingly-transparent fur is made up of hollow hairs called guard hairs. These air-filled guard hairs help transmit heat from the sunlight to the polar bear's black skin as a solar heat collector. In turn, the reflection stops the heat being lost from their black skin.The polar bear's fur seems colorless and for many years, scientists worked on the theory that the individual hairs act as fibre optics bringing sunlight directly to the skin. This has recently been proven to be incorrect, and the hairs are not truly transparent, but contain keratin. Viewed side-on, the hairs appear colorless; viewed lengthwise (as if one was looking down a telescope) the hairs no longer appear transparent.
How does the polar bear's fur keep it warm?
In addition to having a large amount of hair, Polar bears have hollow fur. this allows more heat to be trapped in the fur as air is a good insulatorthey have two layers of fur (just a guess)there fur is like a whale it has blubber and its thickPolar bears have very thick fur so that helps. The fur holds air and serves as insulation that holds in body heat. It is like a coat on a human. They also have black skin underneath that white fur and the sun glares on the black skin, helping them to stay warm.because polar bear fur is hollow, and air is a good conductor.The thick coat of fur traps air that is a poor condutor of heat which slow down the heat loss from escaping quietly from the grizzly bear's body to the cold surroundings, thus keeping the grizzly bear warm.The polar bears coat is about 2.5 to 5cm thick. So they must be pretty warm.Polar bears have transparent fur over black skin. Reflection of the sunlight from the densely packed transparent hairs makes polar bears seem to be white. The bears' black skin absorbs heat from the sun. The transparent fur is made up of hollow hairs called guard hairs. These air-filled guard hairs help transmit heat from the sunlight to the polar bear's black skin as a solar heat collector. In turn, the reflection stops the heat being lost from their black skin.Polar bears have transparent fur over black skin. Reflection of the sunlight from the densely packed transparent hairs makes polar bears seem to be white. The bears' black skin absorbs heat from the sun. The transparent fur is made up of hollow hairs called guard hairs. These air-filled guard hairs help transmit heat from the sunlight to the polar bear's black skin as a solar heat collector. In turn, the reflection stops the heat being lost from their black skin
