What is a field of view and how do you measure it?

How far you can see and idk how to measure it

A field of view is the extent of the observable world that is seen at any given moment Bring the ruler or scale into focus. Move the scale over so that a scale bar, or line on the ruler, is at the farthest left edge of the field of view. Estimate the number of scale bars and spaces that go across your field of view.

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.