3. Because plants don’t have interior or exterior skeletons, they rely on their cell walls to give them structural support. Did you see evidence of this cell structure in plants? How was it different from the animal cells (the blood cells, cardiac muscle, and skin)? 4.The paramecium was the only unicellular organism that Stella viewed through her microscope. All the other organisms were multicellular. How was the unicellular specimen different from the multicellular organisms? 6. Why do you think electron microscopes allow for greater magnification than compound microscopes?