Kaposi’s sarcoma causes cancer of the cells lining the blood vessels, which forms purple splotches on the skin and occurs during coinfection of HIV and
a. Candida albicans.
b. hepatitis C.
c. human herpesvirus 8
d. human papillomaviruses.
Answer: C
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Which statement best summarizes the major distinction between horizontal gene transfer and vertical gene transfer?
A. Genes are more stable in recipient cells following horizontal transfer that in those following vertical transfer. B. The recipient of genes in horizontal transfer is a mature cell, whereas the recipient of genes in vertical transfer is a progeny cell. C. Horizontal transfer is observed in bacteria and archaea, whereas vertical transfer is observed in all cells. D. Organisms that use horizontal transfer can only reproduce asexually, whereas organisms that use vertical transfer can reproduce sexually or asexually.
________ and ________ State that Martin Seligman's "preparedness" concept is activated by survival threats in evolutionary history and relatively resistant to intentional efforts to suppress the resulting fears.
Fill in the blank(s) with the appropriate word(s).
Soil is a reservoir for all of the following EXCEPT
A) Q fever. B) melioidosis. C) blastomycosis. D) histoplasmosis. E) coccidioidomycosis.
If each number represents a population, this illustration provides an example of:
a. a peripherally isolated species. c. reproductive isolation. b. a hybrid zone. d. a ring species.