Answer:
sedimentary rock is from inside volcano when it exploise.
Pineapples, unlike most other fruit, contain an enzyme called bromelain, that breaks up the gelatin into it's amino acid building blocks. [Enzymes are biomolecules that catalyze chemical reactions; most of them are proteins themselves.] Due to the bromelain, your jello doesn't become (or stay) solid.
The difference between gram positive and gram negative is the stuctural difference in the cell walls
