Final answer:
It is true that DNA among East Asians and North American Native Americans are similar, indicating a shared ancestry and supporting the theory of migration over the Bering land bridge. Genetic studies support that closely related species share more genetic similarities.
Step-by-step explanation:
Studies have indeed found that the DNA among East Asians and North American Native Americans are similar, which makes the statement true. This genetic similarity supports the theory that there was a migration over what is now the Bering Strait land bridge during the last ice age. The analysis of genetic material demonstrates that these groups share common ancestry. Moreover, this is consistent with the understanding that humanity as a whole shares common ancestry from Africa, as all non-African genomes have ties to African genomes, though with less genetic variance.
Such genetic studies also reveal that closely related species will have more genetic similarities than those that are more distantly related. For example, in the hypothetical analysis of species A, B, D, and E, we would expect that species that are closer on the phylogenetic tree would share more genetic similarities.