| Answer | Crossword Clue |
|---|---|
| conchiolin | a fibrous protein substance that forms the basic structure of the shell of molluscs |
| Answer | Crossword Clue |
|---|---|
| conchiolin | a fibrous protein substance that forms the basic structure of the shell of molluscs |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.