I believe the term for an observable trait of an organism would be called or noted as the organism's phenotype.
The Law of Superposition.
The Law of Superposition states that each layer is younger than the one beneath it.
On my work the answer was D ..
A sex link trait is connected with a <span>tiny chemical assembly instruction inside of living things </span>that is carried only by the male or female <span>parent. Such as the x and y chromosomes.</span>
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