The cellular structure that was visible in the transmission electron micro graph but not visible in the cells when microscope was used is NUCLEOLUS.
The transmission electron micro graph is a microscopy method that involves using electrons beams to form image of specimens. Transmission electron micro graph can be used to view minute structures of the cell because of its higher optical capacity.
The nucleolus was not seen under the microscope because is a very small cell structure.
It is a perfect example of a natural selection.
(I'm not sure if this is the exact answer that you are looking for.)
At least 3 or 4 small cuts not more than an inch
but it will increase towards the end of the surgery
A DNA temp is used to make a RNA strand !!
so your answer is C !!