What name is given to individual filament?

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks for the name given to an individual filament, specifically in the context of biology and cells.

2. **Identifying the Context**: In biology, particularly in the study of cells, filaments are often referred to in relation to the cytoskeleton, which provides structure and support to the cell.

3. **Recognizing the Type of Filament**: The individual filament in eukaryotic cells is commonly known as an "actin filament."

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