Scientists classify organisms because a. it identify relationships between organisms and to avoid confusion. b. it requires them to clearly identify key characteristics of each organism. c. it allows researchers to always use an organism's common name. d. all of the above

Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.