Question

Given below are some adaptive features of animals:
i) Layer of fat under the skin
ii) Long, curved and sharp claws
iii) Slippery body
iv) Thick white fur
Which of them are the adaptive features of a polar bear'?
A) (i) only
B) (i) and (ii) only
C) (i), (ii) and (iii) only
D) (i), (ii), and (iv) only

Answer 1

Any heritable trait that aids an organism, such as a plant or animal, in surviving and reproducing in its environment is referred to as an adaptation. Many animals have developed body parts that have evolved to help them survive in a specific environment. Webbed feet, sharp claws, whiskers, sharp teeth, large beaks, wings, and hooves are among them.

Complete answer:
The polar bear (Ursus maritimus) is a hyper carnivorous bear native to the Arctic Circle, which includes the Arctic Ocean, its surrounding seas, and surrounding landmasses. It is the world's largest bear species and the world's largest land carnivore.
The life cycle of the polar bear is inextricably linked to sea ice. Polar bears travel, hunt seals, breed, and, in some cases, den on the ice. Polar bears are unlikely to survive if ice-free periods exceed their fasting ability (220 days), according to scientists, especially in areas where there is no alternative marine mammal prey.
Polar bears are excellent swimmers and divers, allowing them to move from one ice floe to the next. However, they can only go so far in the water. Young cubs are especially vulnerable to long swims.
Polar bears live in one of the world's coldest climates and rely on a thick coat of insulated fur that covers a layer of fat that keeps them warm. Fur even grows on the bottoms of their paws, protecting them from cold surfaces and allowing them to grip the ice with ease.
Thus, Option (D): (i). (ii), and (iv) only is correct because of the following adaptive features,
The following are some of a polar bear's adaptations to living in a cold climate:
Polar bears keep themselves warm by engaging in physical activities (such as swimming).
Polar bears are protected from the cold by their large amounts of fat and thick skin.
To maintain a normal body temperature, polar bears congregate in groups. Polar bears blend in with their surroundings thanks to their white fur.

Hence, Option (D): (i). (ii), and (iv) only is the correct answer.

Note:
The unique example of adaptation is, Predators have an easy time catching pufferfish, also known as blowfish. In the ocean, they are slow and easy to spot. If a predator gets too close, the pufferfish can quickly ingest water and air, causing them to grow several times their normal size. If the newly massive pufferfish fails to scare away a predator, the puffer fish's poison will. It releases tetrodotoxin, which is toxic to humans.