Diatoms are microscopic algae composed of separate halves, with delicate siliceous cell walls. They're usually single-celled organisms, though some live colonially. They inhabit fresh and salt waters and are among the most abundant of all phytoplankton.
Coloured scanning electron micrograph (SEM) of the shell of a radiolarian. Radiolaria are single-celled protozoans that are found in marine plankton. This radiolarian has a silicate skeleton with pores through which pseudopodia (false feet
Show globes come in all shapes and sizes, and were used to catch the eye of people passing by. The globes were on display in shop windows, and made customers aware that medicines were available in shops that had the globes in their windows.
Diatoms are single celled plants with shells made of silica. They come in an amazing array of sizes and shapes. Some diatoms stick to things like rocks, plants and the walls of fish tanks. Odontella is one of thousands of marine diatom