AS Biology

Practice QuestionsAS Biology

Practice Questions

This is an image of a fish gill magnified x400. What is the size of an actual filament on a fish gill. Show your working out and use appropriate units

This is an image of the spines on a parasite magnified x1000. What is the actual length of one of these spines? Show your working out and use appropriate units.

AS Biology

Practice Questions

This is a drawing of a cell from the pancreas. The actual distance of the cell from A to B is 8.6 micrometres.

How many times magnified is this image?

Show your working out

AS Biology

Practice Questions

This is an image of e.coli cells. They are typically two micrometres long. Roughly how many times magnified do they appear in this image?