A polygenic trait is a trait controlled by many (poly) genes. Human skin color is an example; it thought to be the controlled by about 12 genes.
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<span>In simple terms, heavier plates get melted
in Mantle, become lighter in form of lava and create new plates. As we
have a re-cycle or the convection currents, there are cycles in
lithosphere.
There is continuous push and pull happening on and
below the Earth. When a plate is subducting on one end, there has to be
some reaction on the other end, right?
Ridge is developed on the
other side, where the same material which has been melted on the
subduction side helps to fill the gap at ridge side. Since the material
is just transfered from heavy to light, and reused in that cell, it is
called a cycle.
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Answer:
A locations air temperature is affected by it's distance from the equator. The closer the location is to the equator, then the more energy that it will receive from the big beautiful, and hot sun.
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