If you're using an up to date light microscope to examine animal cells, you won't be able detect

What do you think?

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I beileve this is the full question. I am having trouble with this book as well. I am thinking ribosomes but just don't know...

2. If you're using an up-to-date light microscope to examine animal cells, you A. bacterial-size cell bodies.
B. the cell nucleus.
C. ribosomes.
D. cell membranes.

I'm thinking its ribosomes

Think about the size of these cells and the wavelength of visible light.