Below you can find the The first marine life the blue-green variety of this appeared over a billion years ago Jeopardy Words Answer. The answer to The first marine life the blue-green variety of this appeared over a billion years ago has 5 letters. This clue belongs to the The earth category and is part of Jeopardy Word Level 1698. If you scroll near the bottom you will find other clues and answers part of level 1698