Both the tides and current are the predictable patterns of movement in the water. The tides are mediated by the gravitational force of the sun and the moon. They are signified by the movement of water up and down for an extended time duration.
When used in combination with water, the term current illustrates the motion of the water. Oceanic currents are mediated by numerous elements. One is the fall and rise of the tides. The tides produce a current in the oceans, in bays, near the shore, and estuaries along the coast. These are known as tidal currents. Tidal currents are the only kind of currents, which vary in a very definite pattern.
Genetic variation is a prerequisite for evolution because natural selection relies upon lessening the frequency of alleles in a population therefore there must be variance in the gene pool
