What is the best description of the paths of s waves and p waves? a. s waves travel through earth's interior. p waves travel along the surface of earth's crust. b. s waves travel through solids, liquids, and gasses. p waves travel through solids or very dense, glassy liquids. c. s waves travel through solids or very dense, glassy liquids. p waves travel through solids, liquids, and gasses. d. s waves travel along the surface of earth's crust. p waves travel through earth's interior.

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.