If viral and bacterial disease can both be caused by injury of the lungs, then viral and what disease can both be caused by injury of the lungs? Answer choices: - tongue - the skin - bacterial - throat - Pollution - fungi - smoking - ribs
bacterial

If cars harm the respiratory system, then what harms the respiratory system? Answer choices: - coal - oxygen - tar - cigars - breathing - silence - sulfur - cars
cars

If viruses can infect and live inside the cells of yeast, then what can infect and live inside the cells of yeast? Answer choices: - fungi - q - parasites - PDAs - rocks - plants - viruses - bacteria
viruses