Misc: What is an organism called that lives on or in a host animal?

Questions

What brand name did Galvin Manufacturing give to its line of radios for motorists?

What Canadian province was the site of England's first overseas possession?

What canal parts redesigned by Leonardo da Vinci in 1497 are still in use today?

What capital city is found near the headwaters of the Bosna River?

What Castro trademark did the CIA try to lace with poison?