Speciation<span> is the term used to describe the formation of a new </span>species<span> due to </span>natural selection<span>.</span>
The aorta is connected to the left side of the heart and carries blood full of oxygen to the rest of the body
<span>Polygenetic inheritance
This type of inheritance is controlled by a group of epi-static genes which regulate expression of one phenotypic trait, which is hair color in this case. Such genes are often large in quantity but small in effect. These genes could also be pleiotropic as well. Polygenes also exist in other organisms apart from humans. </span><span>
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The basic unit of structure and function in all living things is cell
