2.  Cannon

3.  Lorenty

4.  Binning and Rohru

1.  Chloroplasts

2.  Leucoplasts

4.  Chromosomes

1.  Focal length of objective

2.  Focal length of eye piece

3.  Tube length of microscope

1.  Tritiated uridine

3.  Tritiated mannose

4.   Tritiated amino acids

2.  Zernicke

3.  Hooke

4.  Zsigmondy

2.  3-D internal study of tissue

3.  2-D external study

4.  2-D internal study

2.  Eye piece

3.  Both (A) & (B)

4.  Oculometer

1.  Fluorochromes

2.  Polarizer and analyser filter

4.  Objective and ocular lenses

1.  0.01 μm

2.  0.001 μm

4.  0.00001 μm

1.  1A0

3.  100A0

4.  1000A0