The answer to the question stated above is Duplication.
Duplication is one of the chromosomal mutation whereby <span> a segment of chromosome is copied twice, resulting in extra allele.</span><span>
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Chromosomal mutation involves the change in chromosome structure which changes the composition or location allele.
Other chromosomal mutation includes:
<span>Deletion - occurs when a segment of chromosome is broken off and lost. </span>
<span>Inversion - happens when a segment of chromosome is broken off and reattach itself in inverted position.
</span><span>Translocation - takes place when a segment of chromosome is broken off and reattach at different point. </span>
It contains a cellular membrane which separates the interior of the cell from its environment.
<span>D. the crust
Thats the surface of the earth.</span>
Maybe they are the same because they both are part of the human body and they help the body function.