Final answer:
Beta (β) hemolysis is characterized by complete lysis of red blood cells, resulting in a clear zone around bacterial colonies on blood agar plates. Examples of organisms that exhibit beta hemolysis include Streptococcus pyogenes, Staphylococcus, and Bacillus.
Step-by-step explanation:
In beta (β) hemolysis, organisms that can be seen are those that cause complete lysis of red blood cells, resulting in a clear zone around the bacterial colonies on blood agar plates.
One example of an organism that exhibits beta hemolysis is Streptococcus pyogenes, which can be seen as a clear halo surrounding the colonies on blood agar plates.
Other organisms that can cause beta hemolysis include certain species of Staphylococcus and Bacillus.