answersLogoWhite

0

Climactic adaptations. The continent of Africa was the cradle of humanity. As people migrated to colder climates, noses narrowed because the air was colder.Breathing in large amounts of cold air causes bronchial spasms. Hair became straighter and longer to protect ears and neck from the cold.Same with skin color. People closer to the Equator needed more melanin to protect them from the sun. Scandinavian peoples have less intense sun, and long , dark winter days, so don't need as much melanin.

User Avatar

Wiki User

15y ago

What else can I help you with?