The FtsZ protein is present in prokaryotes and in chloroplasts. The protein is structurally and functionally similar to tubulin proteins of eukaryotic cells. Which of the following is a likely conclusion to draw from this information?

Since the protein is structurally similar, it is likely the genes are similar. The sequences would not be identical, since that would imply they are structurally and functionally identical.

It is unlikely that both proteins exist in a common ancestor. The question implies that tubulin is derived from the FtsZ protein since eukaryotic cells are derived from prokaryotic cells.