Excess Nitrates in the water supply
The biggest difference between prokaryotic and eukaryotic is that eukaryotic cells have a nucleus and prokaryotic cells do not.
Answer:
These homologous structure indicates a common ancestry
Explanation:
When 4 organisms show homologous structures, they indicates they belongs to a common ancestor from where the changes takes place in them.
The organs which are structurally dissimilar but functionally same are called as homologous organism.
