Which is true if a population is in genetic equilibrium a) Evolution is occurring

b) new species are evolving

c) allele frequency is changing from one generation to the next

d) allele frequency is remaining the same from one generation to the next

what subject is this

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