If you are a man displaying symptoms of an enlarged prostate, you should contact your doctor and consider getting tested. Symptoms primarily involve difficulty urinating: pain, a slow flow, trouble starting and stopping, or a bloody discharge.
Importance of polar bears. Polar bears are at the top of the food chain and have an important role in the overall health of the marine environment. Over thousands of years, polar bears have also been an important part of the cultures and economies of Arctic peoples.Polar bears depend on sea ice for their existence and are directly impacted by climate changeâserving as an important indicator species.ffects of Climate Change. Polar bears depend on sea ice as a platform from which to hunt seals, rest and breed. For more than 20 years the summer sea ice has been decreasing in size and melting for longer periods of time.
Although most polar bears are born on land, they spend most of their time at sea. Their scientific name means  maritime bear, and derives from this fact. Polar bears hunt their preferred food of seals from the edge of sea ice, often living off fat reserves when no sea ice is present.The polar bear is classified as a vulnerable species, with eight of the nineteen polar bear subpopulations in decline.For decades, large scale hunting raised international concern for the future of the species but populations rebounded after controls and quotas began to take effect.t is a large bear, approximately the same size as the omnivorous Kodiak bear (Ursus arctos middendorffi). A boar (adult male) weighs around 350â700 kg (772â1,543 lb), while a sow (adult female) is about half that size.