If you want evidence for the common ancestor of life on Earth - it's in our genome and biochemistry which:
first, isn't much different from that of most invertebrates, except for the fact that the genome was duplicated twice in the vertebrate lineage (probably both duplication events happened very close to each other in time in Silurian)
second, most of the essential components of the intracellular machinery are the same as in unicellular organisms (actually, they're the same in all eukaryotes, what metazoans developed after they appeared were signal transduction pathways and tissues with their own specific sets of proteins, these appeared later and are not present in single cell organisms)
third, we share a lot of the really essential components (proteins participating in macromolecule synthesis, metabolism and other processes) with bacteria and archaea
If that's not enough, because I'm sure you'll say "Well, that's interpretation, they were designed that way", I have to add that when I say "the same components" this doesn't mean aboslutely the same, it means functionally and structurally similar
In fact there are differences in different groups and "somehow" these differences are proportionally large the more unrelated two species are, not only that, but you can make mathematical models of the divergence of sequences with time and they predict pretty accurately when different groups diverged in the eukaryote lineage, and again, if that's not enough for you, the predicted times coincide with the time when they appear in the fossil record...
Do you want more evidence?
Is this just another interpretation, that doesn't mean more than the others?
first, isn't much different from that of most invertebrates, except for the fact that the genome was duplicated twice in the vertebrate lineage (probably both duplication events happened very close to each other in time in Silurian)
second, most of the essential components of the intracellular machinery are the same as in unicellular organisms (actually, they're the same in all eukaryotes, what metazoans developed after they appeared were signal transduction pathways and tissues with their own specific sets of proteins, these appeared later and are not present in single cell organisms)
third, we share a lot of the really essential components (proteins participating in macromolecule synthesis, metabolism and other processes) with bacteria and archaea
If that's not enough, because I'm sure you'll say "Well, that's interpretation, they were designed that way", I have to add that when I say "the same components" this doesn't mean aboslutely the same, it means functionally and structurally similar
In fact there are differences in different groups and "somehow" these differences are proportionally large the more unrelated two species are, not only that, but you can make mathematical models of the divergence of sequences with time and they predict pretty accurately when different groups diverged in the eukaryote lineage, and again, if that's not enough for you, the predicted times coincide with the time when they appear in the fossil record...
Do you want more evidence?
Is this just another interpretation, that doesn't mean more than the others?