Browse By Audience K-12 Educator

Explore all the different career paths a microbiologist can take.

Use pasta to model what happens to the gut microbiome after multiple rounds of antibiotic treatment. Help students understand the mechanics of evolution through natural selection.

The Gram stain is fundamental to the phenotypic characterization of bacteria. The staining procedure differentiates organisms of the domain Bacteria according to cell wall structure. Gram-positive cells have a thick peptidoglycan layer and stain blue to purple. Gram-negative cells have a thin peptidoglycan layer and stain red to pink. Image from: Riraq25 [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)]