Which of the following bodily fluids is commonly a source of infection by HIV?
A) breast milk
B) semen
C) vaginal secretions
D) both semen and vaginal secretions
E) breast milk, semen, and vaginal secretions
E
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The organisms that obtain energy by oxidation of hydrogen sulfide and use carbon dioxide as a carbon source are called
A. heterotrophs. B. chemoheterotrophs. C. autotrophs. D. chemolithoautotrophs.
Based on the phylogeny of fungi that is currently the most widely accepted, organisms of the phylum
____ belong to the fungal group that diverged the earliest from the rest of the fungi.
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
Four of the five answers below are soil contaminants that can be phytoremediated by plants. Select the exception
a. nitrogen b. lead c. arsenic d. mercury e. trichloroethylene
The ________ of atoms determine how atoms will react with each other.
A. protons B. electrons C. nuclei D. neutrons