For instance, I know chimpanzees have demonstrated abstract thought. But baboons are on a whole different limb of the evolutionary tree.
Scientists already knew that the creatures, which resemble underwater hedgehogs, are the only invertebrates( animals without backbones) on the human branch of the evolutionary tree.
Conclusion: S1 segment of new isolated reovirus is remarkably different from that of other known strains, and it might belong to an independent branch of serotype 2 reovirus in evolutionary tree.
When we look at the so-called evolutionary tree, we're up on the upper right-hand corner with the animals.
As a result, the structure of that evolutionary tree is very unstable and can flip around.
