The mystery of the narwhal tooth

The video explores the unique tooth of the narwhal, known as a tusk. Initially, the purpose of this tusk was a mystery, with theories suggesting it was used for breaking ice, fighting, or attracting mates. However, scientific research revealed that the tusk is a sensory organ, sensitive on the outside and hard on the inside, allowing narwhals to detect changes in temperature, salt concentration, and chemicals in the water, aiding their survival in the Arctic.

What is the unique feature of a narwhal's tusk?

• It is a gigantic tooth.

• It is a flexible jaw.

• It is a colorful feather.

• It is a sharp claw.

Which of the following is NOT a suggested purpose of the narwhal's tusk?

• Fighting other males

• Breaking ice in Arctic waters

• Attracting female narwhals

• Digging for food

How does the structure of the narwhal's tusk differ from other teeth?

• It is hard on the outside and soft on the inside.

• It is soft on the outside and hard on the inside.

• It is equally hard inside and outside.

• It is equally soft inside and outside.

What sensory abilities does the narwhal's tusk possess?

• Sensing temperature and salt concentration

• Detecting light and sound

• Measuring depth and pressure

• Identifying colors and shapes

Why is the narwhal's tusk considered important for its survival?

• It is used for building shelters.

• It assists in navigating through ice.

• It provides sensory information about the environment.

• It helps in hunting large prey.