Below are 4 types of cells (not displayed to scale). Which cell has the smallest size by volume?Yeast cellIntestinal cellSkin cell

To determine which of the given cell types—yeast cell, intestinal cell, or skin cell—has the smallest size by volume, let's analyze the typical sizes of each cell type.

1. Yeast Cell: Yeast cells are generally unicellular organisms. The average diameter of a yeast cell (such as Saccharomyces cerevisiae) is about 3-4 micrometers. Assuming a spherical shape, the volume can be calculated using the formula for the volume of a sphere: $V = \frac{4}{3} \pi r^3$

2. Intestinal Cell: Epithelial cells of the intestine are typically larger than yeast cells, with dimensions around 20-30 micrometers in height and 10-15 micrometers in width. They have a more complex shape, but for simplicity, we can approximate them as rectangular prisms.

3. Skin Cell: Skin cells (keratinocytes) also vary in size, but they are usually around 30-40 micrometers in length and 10-15 micrometers in width. Similar to intestinal cells, their volume can be approximated as a rectangular prism.

Final Answer

By comparing these general sizes, the yeast cell has the smallest volume due to its significantly smaller dimensions compared to intestinal and skin cells. Thus, the yeast cell is the smallest in size by volume among the three types listed.