Explanation:

Taxonomic Hierarchy:
The taxonomic hierarchy is a system used to categorize and classify living organisms based on their similarities and differences. It consists of several levels, including Kingdom, Phylum, Class, Order, Family, Genus, and Species. Each level represents a different level of similarity and encompasses a broader group of organisms.

Number of Common Characteristics:
As one moves from Species to Kingdom in the taxonomic hierarchy, the number of common characteristics generally decreases. This is because as we move up the hierarchy, the groups of organisms become more inclusive and encompass a larger number of species.

Species:
The species is the most specific level in the taxonomic hierarchy. It consists of organisms that share common characteristics and are capable of reproducing to produce fertile offspring. Members of the same species are very similar to each other and can interbreed.

Genus:
The genus is a higher level in the taxonomic hierarchy than species. It represents a group of closely related species that share common characteristics. Organisms within the same genus share more similarities than those in different genera.

Family, Order, Class, Phylum:
As we move up the taxonomic hierarchy from Genus to Family, Order, Class, and Phylum, the groups become even more inclusive and encompass a larger number of species. At each level, the number of shared characteristics decreases, and the organisms within the group become more diverse.

Kingdom:
The Kingdom is the highest level in the taxonomic hierarchy and represents the largest and most inclusive group of organisms. The organisms within the same Kingdom share very few common characteristics compared to those within the same species or genus.

Conclusion:
In summary, as one goes from Species to Kingdom in the taxonomic hierarchy, the number of common characteristics generally decreases. This is because the groups become more inclusive and encompass a larger number of species. The species level represents the most specific and closely related organisms, while the Kingdom level represents the most inclusive and diverse group.

Because the identical characteristics are the most prominent at the top (kingdom)and the least at the bottom(species)