Which microscope is best used for observing the surfaces of intact cells and viruses?
A) phase-contrast microscope
B) darkfield microscope
C) fluorescence microscope
D) brightfield microscope
E) scanning electron microscope
E
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The dark middle layer of the eye that prevents the
scattering of light is the a. fovea. b. retina. c. sclera. d. choroid. e. cornea.
The cells of bacteria can be categorized according to arrangement or style of grouping. The greatest variety in arrangement occurs in bacilli.
a. true b. false
The Lancefield grouping system ________.
A. is based on a DNA fingerprinting assay specific for streptococci B. depends on serological detection of polysaccharide and teichoic acid antigens and is used to identify ? -hemolytic streptococci C. is used to identify ?-hemolytic streptococci D. depends on serological detection of polysaccharide and teichoic acid antigens
What number is the Cytoplasmic matrix?
What will be an ideal response?