Neisseria meningitidis is transmitted by ________.
A. an insect vector
B. sexual contact
C. fomites
D. close contact
Answer: D
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Cellular division within the eukaryotic cells requires DNA to condense into the:
A. 30-nm chromatin fiber. B. 1400-nm chromatin fiber. C. 300-nm chromatin fiber. D. 2-nm chromatin fiber. E. 44-nm chromatin fiber.
Animals in the largest phylum are _____
1.bilateral protostomes 2.unsegmented with a pseudocoel 3.jointed with an exoskeleton 4.segmented with circulatory and digestive systems in all chambers of the coelom
The extensive natural pine forests of the southern Atlantic and Gulf Coasts of the United States are maintained by:
A) grazing. B) frequent logging. C) occasional hurricanes. D) periodic fires.
Flowers which contain only male or female structures are called
A. clones. B. gametophytes. C. imperfect. D. perfect.