What is the basis of modern taxonomical studies ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Taxonomy**: Begin by defining what taxonomy is. Taxonomy is the science of classification of living organisms based on shared characteristics.

2. **Basis of Modern Taxonomical Studies**: Identify the key bases on which modern taxonomical studies are conducted. These include:
- **Cell Structure**: The cellular composition and structure of organisms are fundamental in classification.
- **Ecological Information**: The ecological roles and relationships of organisms in their environments are considered.
- **Developmental Processes**: The study of how organisms develop from embryos to their adult forms helps in understanding their relationships.
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