Question

question 2
scanning electron microscopes (sem) and transmission electron microscopes (tem) have similarities and differences. which of the following accurately states how they differ?
the sem is capable of magnification up to 1,000,000 x, whereas the tem magnifies an object up to 100,000 x
the tem uses light and magnification to observe details of electron elements; the sem produces images on a computer that can be connected to enhance details.
the tem is useful for studying the internal structures of cells, while the sem gives a 3-d view of the external features of cells.
the sem is used to view detailed images of live organisms, whereas the tem is only capable of viewing non-living organisms.

Explanation:

To solve this, we analyze each option by recalling SEM and TEM properties:

1. Magnification: SEM max ~100,000×; TEM max ~50,000,000×. So first option is wrong.
2. Imaging & Specimen: TEM uses electrons (not light) to image thin specimens; SEM produces 3D - like images on a monitor (can connect to video). So second option is wrong.
3. Cell Structure View: TEM is good for internal cell structures (needs thin sections); SEM shows external surfaces (3D view of cell surface features). This matches their uses.
4. Bio - imaging: Both SEM and TEM can view bio - organisms (TEM for internal, SEM for surface). So fourth option is wrong.

Answer:

The TEM is useful for studying the internal structures of cells, while the SEM gives a 3 - D view of the external features of cells.