Misc: Pulp, crown, and root are parts of a(n) ________?

Questions

Frederick II king of Denmark, dies?

Congress decided US flag is 13 red and white stripes and 20 stars.?

Karl Wilhelm Siemens inventor (laid undersea cables), born.?

William Henry Harrison dies of pneumonia and becomes the first U.S. president to die in office.?

Asteroid 54, Kalypso discovered (named for goddess of silence)?