Question

what do scanning electron microscopes and transmission electron microscopes have in common?
both generate three - dimensional images.
both offer magnification to the atomic level.
both are used to view the parts of a cell.
both require a vacuum.

Explanation:

• Scanning electron microscopes (SEM) generate 3 - D images, while transmission electron microscopes (TEM) generate 2 - D images. So the first option is wrong.
• Neither SEM nor TEM can magnify to the atomic level. Electron microscopes have high magnification but not at the atomic scale. So the second option is wrong.
• SEM is mainly used to view the surface of objects, not the internal parts of a cell in detail like TEM. TEM is used for internal cell structures. So the third option is wrong.
• Both SEM and TEM require a vacuum. This is because electrons would be scattered by air molecules if there was no vacuum, which would prevent the formation of a clear image.

Answer:

Both require a vacuum.