fill in the blanks with suitable words :
the shape and size of a cell is related to its ….........

Options

A. density
B. viscosity
C. length
D. function

Explanation

**Step-by-Step Solution:**

1. **Understanding the Statement**: The statement to fill in is "the shape and size of a cell is related to its ….........". This indicates that we need to find a word that connects the physical characteristics of a cell (shape and size) to a specific aspect of its role or purpose.

2. **Identifying Key Concepts**: From the video transcript, we learn that the shape and size of a cell are influenced by its function. This means that different types of cells have different shapes and sizes based on what they do in the body.

3. **Examples Provided**: The transcript mentions specific examples:
- Red Blood Cells (RBCs) have a disk shape to maximize surface area for transporting oxygen and carbon dioxide.
- Amoeba changes its shape to engulf food, indicating that its function requires flexibility in shape.

4. **Choosing the Right Word**: Based on the information, the most suitable word to fill in the blank is "function". This is because the shape and size of a cell are directly related to what the cell is designed to do.

5. **Final Answer**: Therefore, the completed statement is: "the shape and size of a cell is related to its function."

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