A) is alpha-hemolytic.
B) is gamma-hemolytic.
C) is beta-hemolytic.
D) may form endospores.
E) is alpha-hemolytic AND may form endospores.

A) produces propionic acid AND is responsible for the holes in Swiss cheese.
B) produces propionic acid AND requires aerobic environments.
C) produces lactic acid AND is responsible for the holes in Swiss cheese.
D) is responsible for the holes in Swiss cheese AND requires aerobic environments.
E) produces lactic acid AND is a Gram-negative organism.

A) are a form of algae.
B) are prokaryotes.
C) use hydrogen sulfide as an electron source.
D) are eukaryotes.
E) contribute to global CO2 buildup.