Give 4 examples of how abiotic and biotic things interact (e. g. a fish and water)

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

Across of blue x blue (both heterozygous) would result in

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.