Koko the gorilla learned to communicate using gestures from which language?

Which relative and successor of Trajan built a 2nd-century protective wall across northern Britain? What is the name for a dot marking a unit of value on dice or dominoes? In the New Testament, an angel tells which man in a dream, "Take the young child and his mother, and flee into Egypt"? In which 2004 film does a food critic name Adam Sandler's character the best chef in the country? Which aviation pioneers sent a historic telegram home that began, "Success four flights Thursday morning"? Which word for a lack or deficiency is said to make the heart grow fonder? A litmus test can help you place things on which scale, devised by S.P.L. Sørensen? A man with a hawk's head crowned with a sun disk represents which ancient Egyptian sun god?