Cryo-electron tomography uses an electron microscope to obtain remarkably high resolution images, such as those used to understand the structures in planctomycetes bacteria. however, earlier microscopic techniques also led to important discoveries. which of the examples below describes a bacterial characteristic discovered using microscopy? a. electron microscopy has been used to show that mycoplasmas lack cell walls. b. light microscopy with the gram-stain technique has been used to show that bacillus are gram-negative rods. c. electron microscopy has been used to identify the reticulate body in mycobacteria. d. light microscopy and the acid-fast staining technique can be used to distinguish clostridium from all other genera of bacteria.