A picture of a patient’s lung showed it to be shriveled and darker than usual. Which is most likely the cause of this lung condition?

A. smoking
B. overeating
C. sickle cell anemia
D. poor refrigeration

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.