Which structures are at the end of the smallest tubes in the lungs?

Which of these contraceptive methods would be most beneficial for a female who wishes to avoid side effects or surgery?

Which of the following can be effective in preventing the onset of viral infection in humans? a) taking vitaminsb) getting vaccinatedc) taking antibioticsd) taking drugs that inhibit transcription

What disease is characterized by the unrestricted growth of abnormal cells on or in the tissues of the body? a) protozoan infection. b) cancer c) diabetes. d) coronary heart disease