The process by which totipotent embryonic cells are converted into specialized cells constituting and giving specific tissues termed determination or differentiation.

Explanation

### Step-by-Step Text Solution

1. **Understanding the Question**: The question asks about the process by which totipotent embryonic cells are transformed into specialized cells that form specific tissues.

2. **Defining Key Terms**:
- **Totipotent Cells**: These are the cells that have the potential to develop into any type of cell in the body, including all types of tissues and organs.
- **Specialized Cells**: These are cells that have specific functions and characteristics, such as nerve cells, muscle cells, or blood cells.

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