PLEASE HELP ME Why are planets round?
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A. Gravity pulls mass in one direction

B. Gravity pushes mass out from the center

C. Gravity pulls mass into its core from all directions equally

D. Elliptical orbits smooth out planetary imperfections

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

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.

Explain why scientists use the word dominant for certain traits.