Scientists have studied patterns of development and differentiation of cells and tissues in a wide variety of species. Which statement describes the role and function of master control genes, or Hox genes, in many species?

Dr. arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two chemicals explode. it measures the volume of the sound that occurs at the minimum pressure at which the explosion will occur. it then increases the pressure and measures the volume of the explosions that occur. what kind of investigation is the scientist conducting?