The exhaust from car engines spreads throughout our atmosphere and adds to pollution. What is this an example of? A.

An increase in enthalpy

B.

An increase in thrust

C.

An increase in thermodynamics

D.

An increase in entropy

(D is the correct answer!)

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.