| Answer | Crossword Clue |
|---|---|
| proplastid | a precursor of a cell plastid |
| proplastids | PROPLASTID, a precursor of a cell plastid |
| eobiont | a hypothetical chemical precursor of a living cell |
| melanoblast | a cell that is a precursor of a melanocyte or melanophore |
| melanoblasts | MELANOBLAST, a cell that is a precursor of a melanocyte or melanophore |
| chromatophore | A cell or plastid that contains pigment |
| chromatophores | A cell or plastid that contains pigment |
