Polar bear. Although it is the sister species of the brown bear, it has evolved to occupy a narrower ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice and open water, and for hunting seals, which make up most of its diet. Although most polar bears are born on land, they spend most of their time on the sea ice. Polar bears hunt their preferred food of seals from the edge of sea ice, often living off fat reserves when no sea ice is present. Because of their dependence on the sea ice, polar bears are classified as marine mammals; an alternative basis for classification as marine mammals is that they depend on the ocean as their main food source.
Polar bears depend on sea ice.
Determine if the claim is supported, refuted, or if there is not enough information based on the evidence.

Claim: Polar bear. Although it is the sister species of the brown bear, it has evolved to occupy a narrower ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice and open water, and for hunting seals, which make up most of its diet. Although most polar bears are born on land, they spend most of their time on the sea ice. Polar bears hunt their preferred food of seals from the edge of sea ice, often living off fat reserves when no sea ice is present. Because of their dependence on the sea ice, polar bears are classified as marine mammals; an alternative basis for classification as marine mammals is that they depend on the ocean as their main food source.

Evidence: Polar bears depend on sea ice.

Options: 

 - supported

 - refuted

 - not enough information
supported
Determine if the claim is supported, refuted, or if there is not enough information based on the evidence.

Claim: Polar bear. Although it is the sister species of the brown bear, it has evolved to occupy a narrower ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice and open water, and for hunting seals, which make up most of its diet. Although most polar bears are born on land, they spend most of their time on the sea ice. Polar bears hunt their preferred food of seals from the edge of sea ice, often living off fat reserves when no sea ice is present. Because of their dependence on the sea ice, polar bears are classified as marine mammals; an alternative basis for classification as marine mammals is that they depend on the ocean as their main food source.

Evidence: Polar bears depend on sea ice.

Options: 

 - supported

 - refuted

 - not enough information
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supported
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