The cellular process in which materials are moved across a membrane from an area of low concentration to an area of high concentration is called

answer; i believe the answer is (polygenic inheritance;

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave