What two factors affect the speed of a sound wave as it travels through a medium

Which sequence represents a cross section of the bilayera hydrophilic head, hydrophobic tail, hydrophobic tail, hydrophilic headb hydrophobic tail, hydrophilic head, hydrophobic tail, hydrophilic headc hydrophobic head, hydrophilic tail. hydrophilic tail, hydrophobic headd hydrophilic tail, hydrophobic head, hydrophobic head, hydrophilic tail

Environmental differences within ecosystems are generally caused by

Drag each tile to the correct location. match each trait that an organism displays to a reproductive strategy.