Biology

~Light microscopes magnify up to about x2000 & have a resolving power of about 200nm.

~Electron microscopes magnify up to about x2 000 000, & have a resolving power of around 0.2nm.

~Magnification = size of image / size of real object

                       / I \

                    / A x M \

~Animal cell features common to all cells - 

          -Nucleus-Contrains DNA

          -Cytoplasm- liquid in cell that suspends all the organelles

          -Cell membrane-Allows gases in & out the cell

          -Mitochondria-turns oxgyen & gulcose in energy-respiration

          -Ribosomes-Site of protein synthesis

~Only in Plant cells - 

         -Cell wall-provide support and protection