Margarine and petri dish: what they have in common

1. Step 1. Margarine — uses — Hydrogenation. Hydrogenated oils.
2. Step 2. Hydrogenation — uses — Catalysis. A nickel catalyst.
3. Step 3. Catalysis — is a kind of — Chemical reaction. Speeding up a reaction.
4. Step 4. Chemical reaction — includes — Fermentation. A biochemical reaction.
5. Step 5. Fermentation — is used in — Antibiotic. Penicillin is produced by fermentation.
6. Step 6. Antibiotic — uses — Petri dish. Fleming noticed mould in a Petri dish.

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