What is the name of the cell formed by the union of two gametes?

A cease-fire agreement to end which war was signed in Paris on January 27, 1973? A cedilla, a circumflex and a macron are all examples of which kind of mark? What is a celebration marking a 10-decade anniversary called? Which keyboard instrument, famous from Tchaikovsky's "Dance of the Sugar Plum Fairy," makes its bell-like sound with ha… Which tower, built as the centerpiece of the 1962 World's Fair, took its inspiration from science-fiction art and a Ger… A pair of century-old paintings by C.M. Coolidge sold for $590,400 at a 2005 auction. What animals are shown playing po… What word can mean both a cerebral hemorrhage and a fit of rage? Which small white bean got its name because a certain military branch has served it as a staple since the mid-1800s?