12 MEDICAL DEVICE REGULATIONS In Canada, devices of classes III and IV are subject to in-depth regulatory scrutiny,while class II devices require only the manufacturerâs declaration of device safety andeffectiveness before sale.
No problem: Polar bears in the study were seen swimming distances of 90 miles without any problems - and some bears went a lot further Scientists discovered that during the summer months, when sea ice is at its minimum, the bears were swimming farther and for longer periods of time than ever before in search of new hunting grounds.
Temperatures in the Arctic. The temperatures that the polar bears have to endure in the winter can range from -40Â°F (-40Â°C) to as cold as -90Â°F (-90Â°C). The summer months can be much warmer for the polar bears with temperatures reaching to 77Â°F. (25Â°C). Polar bears have to be able to handle 100Â° difference in temperature between the seasons. Polar bear habitat, polar bear description affects of global warming and climate change on the polar bear.