Which one of the following viruses has a single-stranded RNA genome that must be turned into a complementary molecule in order to synthesize viral protein?
A. Rotavirus
B. Adenovirus
C. HIV
D. Polio virus
E. Influenza virus
E
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Plant cells typically achieve cytokinesis by:
A. binary fission. B. forming a cell plate across the middle of the cell. C. forming a cleavage furrow that pinches the cell into two. D. chromosome condensation. E. chromosome elongation.
All invertebrates have phagocytic cells, but lack antibodies
Indicate whether the statement is true or false.
Lichens are symbiotic relationships established
between a. a club fungus and a green alga. b. a club fungus and a cyanobacterium. c. sac fungi and green algae. d. sac fungi and cyanobacteria. e. any of these.
Autoimmune diseases occur when the immune system is unable to discriminate "self" from "nonself."
Indicate whether the statement is true or false