Below you can find the Earth's first land vegetation may have been these minute green plants that grow on rocks & damp banks Jeopardy Words Answer. The answer to Earth's first land vegetation may have been these minute green plants that grow on rocks & damp banks has 5 letters. This clue belongs to the Botany category and is part of Jeopardy Word Level 2622. If you scroll near the bottom you will find other clues and answers part of level 2622