Why the determination of relationship becomes more complex in higher taxonomic categories?

Options

A. Number of common character goes on decreasing in lower taxa
B. Number of common character goes on decreasing in higher taxa
C. Because classificaton itself is very difficult process
D. Number of common characters goes on increasing in higher taxa.

Answer

### Step-by-Step Solution:

1. **Understanding Taxonomic Hierarchy**: Taxonomy is the science of classifying organisms. It is organized in a hierarchical structure that includes categories such as domain, kingdom, phylum, class, order, family, genus, and species. The higher the taxonomic category, the broader the classification.

2. **Defining Higher Taxonomic Categories**: Higher taxonomic categories (like kingdom or phylum) encompass a wide variety of organisms. For example, the kingdom Animalia includes all animals, which can be vastly different from one another.

3. **Common Characters in Lower vs. Higher Taxa**: In lower taxonomic categories (like species or genus), organisms tend to share many common characteristics because they are more closely related. For instance, all members of a species can interbreed and produce fertile offspring.

4. **Decreasing Common Characters in Higher Taxa**: As we move up the taxonomic hierarchy to higher categories, the number of shared characteristics decreases. This is because the organisms included in these categories can be very diverse. For example, the kingdom Animalia includes mammals, birds, reptiles, and more, which have fewer common traits compared to species within a single genus.

5. **Complexity of Determining Relationships**: The decrease in common characteristics makes it more complex to determine relationships among organisms at higher taxonomic levels. The greater diversity means that it is harder to find traits that are shared among all members of a higher taxon.

6. **Conclusion**: Therefore, the determination of relationships among organisms becomes more complex in higher taxonomic categories because the number of common characters goes on decreasing as we move from lower taxa (like species) to higher taxa (like kingdom).

### Final Answer:
The determination of relationships becomes more complex in higher taxonomic categories because the number of common characters goes on decreasing in higher taxa.

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