useless trivia: What Word Means: To Remove Tin From Articles Plated With Tin?

Questions

Mice, whales, elephants, giraffes and man all have ---------- neck vertebra.?

Research indicates that ---------- are attracted to people who have recently eaten bananas.?

Research indicates that mosquitos are attracted to people who have recently eaten---------- .?

---------- are in the same family as horses, and are thought to have inspired the myth of the unicorn.?

Rhinos are in the same family as---------- , and are thought to have inspired the myth of the unicorn.?