Question

the measurement indicated by the line across the center of the cell is be
diameter
radius
area
volume

Explanation:

Step1: Recall definitions

• Diameter: A straight line passing through the center of a circle (or in this case, the cell which is roughly circular - like in shape) and connecting two points on its circumference.
• Radius: A straight line from the center of a circle to a point on its circumference.
• Area: The measure of the region enclosed by the circle (formula \(A = \pi r^{2}\) or \(A=\frac{\pi d^{2}}{4}\) where \(r\) is radius and \(d\) is diameter).
• Volume: A measure of the amount of space occupied by a 3 - D object. The line in the picture is a 1 - D measurement.

Step2: Match the definition with the line

The line crosses the center of the cell (similar to a circle - like shape) and connects two points on the boundary. This matches the definition of diameter.

Answer:

Diameter