Select:   L for left image, R for right image.
___1.  image was obtained using a light microscope
___2  image obtained using electron microscope

___3. What is the approximate diameter of the cell shown in the image on the right (see scale).
a.  1 micrometer
b.  2 micrometers
c.  5 micrometers
d.  10 micrometers
e.  5 nanometers

___4.  1 micrometer is equal to
a.  10 nanometers
b.  100 nanometers
c.  1000 nanometers
d.  10000 nanometers
e. 100000nanometers