Phylogenetic relationships, which represent the evolutionary connections between different species, are most commonly depicted using a \textit{dendrogram}. A dendrogram is a tree-like diagram that shows the relationships between species, based on similarities or evolutionary distance.
(1) Why Other Options Are Incorrect:
- Gene Bank is a database that stores genetic sequence data but does not visually represent phylogenetic relationships.
- Data retrieving tool and Data search tool are tools used for searching and retrieving biological data but do not provide a visual representation of phylogenetic relationships.
Conclusion:
The correct representation of phylogenetic relationships is a dendrogram.