Question

question 1-1
the list below contains the names of different types of microscopes that are used by scientists in a variety of fields.

• compound microscope
• transmission electron microscope
• dissection microscope
• scanning electron microscope

which of the following microscopes require that specimens be non - living in order to be observed?
○ compound microscopes and dissection microscopes
○ scanning electron microscopes and dissection microscopes
○ compound microscopes and transmission electron microscopes
○ transmission electron microscopes and scanning electron microscopes

Explanation:

Transmission electron microscopes (TEM) and scanning electron microscopes (SEM) require specimens to be non - living. Specimens for TEM are thinly sliced and chemically fixed, and SEM specimens are coated with a thin layer of metal, processes that kill the specimens. Compound and dissection microscopes can be used to observe living specimens.

Answer:

transmission electron microscopes and scanning electron microscopes