Polar Bears: Evolution and Adaptations

Polar bears are unique animals adapted to life in the Arctic, with a diet primarily of marine animals. They evolved from brown bears, adapting quickly to cold and semi-aquatic environments. Their evolution includes significant genetic changes, particularly in diet-related genes. Polar bears are top predators, hunting other carnivores, which is rare. They face challenges due to climate change, impacting their food sources and habitat. Their adaptations and ecological role highlight their remarkable evolutionary journey.

What is the scientific name of the polar bear?

• Ursus maritimus

• Ursus americanus

• Ursus thibetanus

• Ursus arctos

Which bears are closely related to polar bears?

• Black bears

• Panda bears

• Brown bears

• Sun bears

How old is the oldest physical record of polar bears?

• 5,000 years

• 10,000 years

• 15,000 years

• 20,000 years

What adaptation helps polar bears walk on thin ice?

• Thicker fur

• Larger paws

• Webbed feet

• Smaller ears

How long can polar bears hold their breath underwater?

• 2 minutes

• 1 minute

• Over 3 minutes

• 3 minutes

What is the primary prey of polar bears?

• Penguins

• Seals

• Small whales

• Fish

What gene is heavily selected for in polar bears due to their diet?

• CFTR gene

• TP53 gene

• BRCA gene

• APOB gene

What is a significant dietary change in polar bears compared to other bears?

• They are herbivorous

• They eat more insects

• They are strictly carnivorous

• They eat more plants

Why are polar bears vulnerable to climate change?

• They have a slow metabolism

• They have a short lifespan

• They rely on a large population of prey

• They cannot swim long distances

What vitamin do polar bears have a high tolerance for?

• Vitamin C

• Vitamin A

• Vitamin D

• Vitamin B12