What is the differences between bacteria and white blood cells?

1. Bacteria have a single, circular chromosome. White blood cells have many, (more-or-less) linear chromosomes. (Exact number depends on species.)

2. The bacterial chromosome is loose within the cell. In white blood cells (and other eukaryotic cells), the chromosomes are contained within the neucleus.

3. Bacteria do not (generally) contain organelles. (Although some may contain gas vesicles or simple nutrient storage structures.)

4. Bacterial ribosomes are smaller than eukaryotic ribosomes. (70S vs. 80S)

5. Bacteria have a cell wall, white blood cells do not.

6. Depending on the type of bacteria they may or may not photosynthesize (eg. cyanobacteria). White blood cells never photosynthesize.

7. Some bacteria may have cilia and/or flagella.

8. A bacterium is a complete organism all on its own. A white blood cell is part of a much larger organism.

9. Bacteria reproduce via "binary fission" or "budding", white blood cells replicate via mitosis.