Answer:
A seed am I, three letters make my name. Take away two and I still sound the same.
What can stand in place of a country but still fold away in a drawer?
Some live in me, some live on. And some shave me to stride upon. I rarely leave my native land. Until my death I always stand. High and low I may be found. Both above and below ground.
What has a bell but isn't a church. Is full of air but is not a balloon?
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
When is it bad luck to see a black cat?