| Answer | Crossword Clue |
|---|---|
| EOHIPPUS | Ancestor of the modern horse |
| ENIAC | Ancestor of the modern digital computer |
| CITRON | Ancestor of the modern lemon and lime |
| EOHIPPUS | Ancestor of the horse. |
| protohuman | a prehistoric primate, a supposed ancestor of modern man |
| protohumans | PROTOHUMAN, a prehistoric primate, a supposed ancestor of modern man |
