B) focuses light on the specimen
C) phase contrast microscopy
B) surface morphology.
A) transmission electron microscope
B) does not destroy internal structures
C) 64x oil, N.A. 1.4
A) internal structure of fixed cells.
C) Acetone differentially destains Gram negative cells.
D) All the statements above are true
A) The specimen must be stained with osmium or other heavy metal.
B) Uses circular filters in the condenser and objective to give contrast to parts of the cell with different refractive indices.
C) each objective is positioned to be in focus at the same stage height.
C) illuminates the specimen with light of two different phases.
23. Darkfield microscopy is best for visualizing live, motile microorganisms.
A) True
B) False
A) True