Misc: on what continent would you find an echidna?

Questions

During the time of Peter the Great, any Russian man who wore a ---------- was required to pay a special tax.?

Hair is made from the same substance as---------- .?

Hairstylist Anthony Silvestri cuts hair while---------- .?

Human ---------- is estimated to grow at 0.00000001 miles per hour.?

Intelligent people have more ---------- and copper in their hair.?