"AP physics"

Yeast strains are ideal for genetic study because they are easy to grow and maintain, their life cycle is complete in approximately one week, and you can arrest different stages of the life cycle by growing it on different types of media.

Ames test strain for detecting carcinogens. Causes infection in humans. 

Formalin Preserved.

Gray and poorly sorted, with a gritty texture.

Our Most Popular collection.

Beginner’s Collection Illustrates Important Physical Properties

Specimens To Supplement the Most Widely-Used College Lab Manual for Physical Geology

Specimens To Supplement the Most Widely-Used College Lab Manual for Physical Geology

A Complete Kit to Communicate the Concept of Hardness in Minerals

Coarse-grained, with microcline, biotite and horblende phenocrysts.

Gray to white, coarse crystalline, carbonate rock.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Glassy; most specimens float in water.

Fightly cemented, medium-to-coarse quartz grains.

Pure, bright yellow, Frasch sulfur.

Grayish black trap rock.