| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| In a bird's egg, it's contained within the vitelline membrane | Yolk | $100 | J | BIOLOGY | 2000-03-07 | #3577 | |
| As opposed to bird eggs, human eggs have very little of this material in which nutrients are stored | the yolk (albumen) | $400 | DJ | BIOLOGY | 1995-10-09 | #2551 | |
| Endoderm, the stuff that forms your gut lining, also forms the sac in an egg that holds this | the yolk | $500 | J | BIOLOGY | 1988-05-03 | #857 | |
| The only part of a chicken egg not formed on its way down the oviduct | the yolk | $800 | DJ | BIOLOGY | 1986-05-07 | #433 |