Haemophilus capsule polysaccharide plus diphtheria toxoid is a(n)
A) inactivated whole-agent vaccine.
B) attenuated whole-agent vaccine.
C) conjugated vaccine.
D) subunit vaccine.
E) toxoid vaccine.
C
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Experiments have shown that increased nitrogen deposition may affect the composition of
communities of ____ fungi.
a. mycorrhizal b. club c. parasitic d. all e. lichen
Protists are
a. autotrophic. b. heterotrophic. c. unicellular. d. multicellular. e. all of these.
A cell that neither gains nor loses water when it is immersed in a solution is what?
A. hypertonic to its environment. B. metabolically inactive. C. hypotonic to its environment. D. isotonic to its environment.
The first compound light microscopes were constructed by the end of the sixteenth century. What is a compound microscope?
A) they have two different light sources B) it has a moveable stage C) it has two lenses D) its lens is double the size of the original microscope E) the lens has two different colors