How do biological systems respond when acids or bases are added? O Cells produce different molecules that can function at the new pH levels.

O Most biological molecules can function at any pH value.

O They have substances that counteract acids or bases to prevent the pH from changing

O Biological systems do not experience any changes in pH.

significant amounts of nitrogen oxides, carbon monoxide, and other pollution

explanation:

passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.

easy

explanation: