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:

• Analyze each option:
• Option 1: Scanning electron microscopes (SEM) generate 3D images, but transmission electron microscopes (TEM) generate 2D images. So this is incorrect.
• Option 2: Neither SEM nor TEM typically magnify to the atomic level (atomic - level imaging is more for techniques like scanning tunneling microscopy). So this is incorrect.
• Option 3: While both can be used to view cell parts, this is not a defining common feature unique to just these two electron microscopes (light microscopes can also view cell parts).
• Option 4: Both scanning and transmission electron microscopes require a vacuum environment because electrons scatter in air, and a vacuum is needed to allow the electron beam to travel without interference.

Answer:

D. Both require a vacuum.