Bacterial Cells. Bacterial cells are very small-about 10 times smaller than most plant and animal cells. Most bacterial cells range in size from 0.2 to 10 microns or micrometers (0.0000079 to 0.00039 inches). Common Escherichia coli, or E.coli, bacteria are rod-shaped bacteria, 1 micron by 2 microns long.
1 Installing a concrete paver patio averages between $8 and $15 per square foot.  Stone: The most natural option, stone comes in several sizes, textures, colors and styles. Most homeowners opt for stone to create a design-focused patio. Installing a stone paver patio averages between $4 and $8 per square foot.
Whether you decide to lay the material yourself or hire a contractor, you'll find the best selection of stonework at a landscaping service or lawn and garden center. A landscaping service will charge $1,124 to lay stone pavers in a 10-foot-by-12-foot patio, which includes labor and material. You can buy the materials for $450, which include the pavers, gravel and sand, and do the job yourself, saving 60 percent.