Which best explains how green plants use the sun's energy? a. special structures in the plant absorb photons. b. oxygen is heated by the sun and enters the plant. c. green leaves are easily cooled by the sun. d. the sun's carbon dioxide is absorbed by chloroplasts.

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.