cell size maximizes the ability of diffusion and motor proteins to transport nutrients and waste products.

The size of a cell is crucial for its function and survival. Here's why:

1. Surface Area to Volume Ratio: As a cell grows, its volume increases at a much faster rate than its surface area. Since the cell membrane is the site of nutrient intake and waste removal, a smaller cell (with a larger surface area to volume ratio) can more efficiently transport these substances.

2. Diffusion: Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In smaller cells, nutrients and waste products have less distance to travel, making diffusion more efficient.

3. Motor Proteins: These proteins move along the cell's cytoskeleton to transport substances. In smaller cells, these proteins can more quickly and efficiently transport nutrients and waste products.

Therefore, a smaller cell size maximizes the ability of diffusion and motor proteins to transport nutrients and waste products, ensuring the cell's survival and proper function.