Toxoids
A. are always genetically engineered.
B. contain modified bacterial exotoxin molecules.
C. confer passive immunity.
D. contain select antigenic components of a pathogen rather than whole cells or viruses.
E. All of these choices are correct.
Answer: B
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Eukaryotic ribosomes may be free in the cytoplasm or attached to the ________.
What will be an ideal response?
In experiments by Greene and colleagues (1987 ) with the tephritid fly Zonosemata vittigera and the jumping spider Phidippus apacheanus, the purpose for gluing housefly wings onto the bodies of the tephritid fly was to ________
A) test for the effect of wing surgery in preventing predation B) test for effect of wing markings in preventing predation C) control for the effect of wing waving in preventing predation D) test for the effect of wing shape in preventing predation
The salt marsh system is dominated by
A) carnivores. B) herbivores. C) secondary consumers. D) decomposers.
Which of the following have sensory structures that are structurally similar?
a. lateral line organs and statocysts b. Golgi tendon organs and lateral line organs c. lateral line organs and semicircular canals d. statocysts and Golgi tendon organs e. statocysts and semicircular canals