How can a chikungunya infection be differentiated from a dengue infection?
A) Differentiation is based on symptoms due to the two presenting quite differently.
B) liver biopsy
C) blood tests that identify viral antigens, viral RNA, or patient antibodies to the virus
D) microscopic analysis of the blood
E) stool analysis
Answer: C
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Molecular data shows that land plants and charophytes
A. are in the same clade and form a monophyletic group. B. are in different clades but form a monophyletic group. C. do not share common ancestry. D. are in different clades and form a polyphyletic group. E. are in the same clade but form a polyphyletic group.
Ulva is a genus of algae in the phylum Chlorophyta. What characteristic does Ulva share with ferns?
A. Vascular tissue for the transport of substances. B. An embryonic sporophyte housed in maternal tissues. C. The ability to synthesize organic nutrients using light. D. Intercellular communication via plasmodesmata. E. The production of sperm and eggs for reproduction.
Gene therapy has been successful in curing some individuals of autoimmune disorder and sickle cell
disease.
Indicate whether the statement is true or false.DNA strands can begin to separate at the temperature of ________.
A. 60°C B. 100°C C. 90°C D. 42°C E. 37°C