The video explains that only 5% of the human body is hairless, specifically the lips, palms, and soles. Humans have the same number of hair follicles as chimpanzees, but human hair is less thick and dark. Hair is a defining characteristic of mammals, with only a few species like elephants and whales being nearly hairless.

What percentage of the human body is hairless?

• 20%

• 5%

• 10%

• 15%

Which parts of the human body do not grow hair?

• Palms, soles, and scalp

• Lips, palms, and soles

• Ears, nose, and lips

• Lips, ears, and soles

How does human hair differ from chimpanzee hair?

• Human hair is less thick and less dark

• Chimpanzee hair is less thick and less dark

• Chimpanzee hair is thicker and darker

• Human hair is thicker and darker

What is a common characteristic of mammals?

• Having scales

• Having feathers

• Having hair or fur

• Having fins

Which of the following mammals is considered nearly hairless?

• Elephant

• Lion

• Giraffe

• Kangaroo