The epidemic relapsing fever in humans is transmitted by
A. hard-shelled ticks
B. body louse
C. direct contact
D. soft-shelled ticks
Ans: B. body louse
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In viral infections involving double-stranded DNA viruses, all of the viral genes are usually expressed prior to the replication of viral nucleic acid.
Answer the following statement true (T) or false (F)
Which of the following would allow optimal population growth?
a) unlimited resources b) accumulation of waste products c) predation d) competition e) limited access to food and water
Which of the following structures is found in a human eye, but not in an octopus eye?
A. Lens B. Optic nerve C. Retina D. Blind spot E. Cones
________ resist tensile forces and contain keratin to form the protective barrier of the skin.
A) Intermediate filaments B) Microtubules C) Microfilaments D) Actin filaments E) Keratin-associated filaments