| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| This gas is produced by plants during photosynthesis | Oxygen | $400 | DJ | BOTANY | 1997-07-09 | #2978 | |
| Around 1775 chemist Joseph Priestley showed that plants produce this gas | oxygen | $400 | DJ | BOTANY | 1992-03-03 | #1737 | |
| Green leaves turn carbon dioxide & water into sugar & this | oxygen | $200 | DJ | BOTANY | 1985-10-23 | #293 |