Baby Names Beginning With "G": Meaning: A Pledge, A Pawn?

Questions

What fish famed for its teeth,has no bones in its skeleton?

What fish has both lungs & gills?

What five lettter word describes an animal that is produced as an exact copy of another?

What flavour of ice cream is eaten the most?

What flightless bird became extinct in 1681 after being devoured by Europeans for food?