1. Credit: © Dr. Gary Gaugler/Visuals Unlimited
A coccus-shaped bacteria. SEM.
188887

2. Credit: © Dr. Dennis Kunkel/Visuals Unlimited
Lactobacillus is a gram-positive, rod prokaryote, non-spore forming, anaerobic or microaerophilic that occurs singly or in pairs. Lactobacillus is important in commercial lactic acid production (food products). SEM X2600.
199834

3. Credit: © Science VU/Visuals Unlimited
Treponema pallidum is the bacterial pathogen that causes syphilis. Treponema are flexible, spiral-shaped bacteria with flagella. SEM.
196156

4. 29682
Credit: © Michael Abbey/Visuals Unlimited
Paramecium caudatum. X100.

5. 279606
Credit: © Carolina Biological/Visuals Unlimited
Euglena. LM.

6. 196193
Credit: © K.W. Jeon/Visuals Unlimited
Amoeba surrounding prey (Tetrahymena). SEM X410.

7. Credit: © Carolina Biological/Visuals Unlimited
214056
Credit: © Carolina Biological/Visuals Unlimited
Rotifers.

8. 171148
Credit: © Science VU/Visuals Unlimited
Mixed marine diatoms from the ocean floor. These unicellular photosynthetic algae usually have walls of silica which resist decomposition and large deposits known as diatomaceous earth have many industrial uses. SEM X2800.

9. Credit: © Tom Adams/Visuals Unlimited
304832
Credit: © Tom Adams/Visuals Unlimited
A living microscopic Nematode among Oscillatoria Cyanobacteria. LM X150.