What are the different shapes of bacteria, and can you provide examples of each shape?
Bacteria can have different shapes, including cocci (spherical), bacilli (rod-shaped), and spirilla (spiral-shaped). Examples of cocci bacteria include Streptococcus and Staphylococcus. Examples of bacilli bacteria include Escherichia coli and Bacillus anthracis. Examples of spirilla bacteria include Spirillum and Helicobacter pylori.