| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| Silvics is the study of these, & silviculture, the art of their propagation | trees | $1,600 | DJ | LESSER-KNOWN SCIENCES | 2024-02-28 | #9048 | |
| In dendrology you'll learn that growth rings on these are wider in El Nino years | trees | $400 | DJ | -OLOGIES | 2013-07-17 | #6653 | |
| Dendrochronology tries to reconstruct past climates using information stored in these living things | trees | $800 | DJ | -OLOGIES | 2010-09-27 | #5986 |