Suggest a modern piece of evidence for the evolution of species, as seen through a series of fossils that display gradual adaptations. pls help this is the last question i need to finnish my hw and i havent slept for so long :(

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.