| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| More than 90% of all creatures are considered this, meaning they have no spinal column | invertebrates | $400 | DJ | SCIENCE | 2020-02-03 | #8151 | |
| The books in Libbie Hyman's 6-volume study of these have spines; by definition, the creatures in them don't | invertebrates DD | $1,500 | DJ | SCIENCE | 2001-06-26 | #3887 |