Can you tell from this tree whether a C at position 15 evolved before or after a T at position 15? Explain your answer.

20 the compound al(nh3)2 has atoms of nitrogen.

How water is moving through the ecosystem ?

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.