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.
Physical Adaptations. 1  Polar bears are marine animals. 2  They use their large claws and teeth to tear apart their prey. 3  Have excellent sense of smell and hearing which helps them catch their prey. 4  Have thick, sand paper like paws which helps them run on the slippery ice.