Explain, with examples, why we find animals of certain kinds living in particular climatic conditions.

We find animals of certain kinds only in particular climatic conditions because all living organisms are adapted to survive in a specific habitat only. These organisms develop certain features which help them adapt to the habitat and their conditions.

For example, polar bears survive only in the arctic region. Polar bears possess blubber, or thick layers of skin, as it behaves as insulation against the cold. They possess a greasy coat that sheds water after swimming and helps in reducing heat loss.

The polar bear has a longer body, cranium, and nose than the brown bear. Small ears and legs. Adult feet are 30 cm (12 in) across to disperse weight while walking on snow or ice and offer propulsion when swimming. Small, soft papillae (dermal bumps) give traction on ice.

The polar bear's short, stocky claws may help it grip hefty prey and ice. The claws' scooped undersides help them dig in ice. Captive polar bears are rarely overweight or obese, presumably due to warm zoo settings. Polar bears have 42 teeth because they eat meat. The brown bear has smaller, jagged cheek teeth and larger, sharper canines.

Polar bears are insulated by 4in of adipose tissue, their hide, and their fur. Polar bear fur comprises of dense underfur and translucent, white-to-tan guard hairs. The guard hair is 5–15 cm (2–6 in) long. Polar bears moult from May to August, although they don't shed their coat for summer camouflage like other Arctic mammals. Once, it was supposed that polar bear guard hairs acted as fiber-optic tubes to transfer light to its black skin.

Age yellows white coats. In warm, humid confinement, algae can grow in the guard hairs, turning the fur green. The polar bear can smell seals 1 km away and buried under 3 ft of snow. It has human-like hearing and long-range eyesight.

Polar bears can swim for days. The bear swims using its huge forepaws and body fat as buoyancy.


Simply Easy Learning

Updated on: 09-Jan-2023


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