Humans first left Africa in a massive migration of roughly 40,000 individuals roughly 60 Kya
a. true
b. false
Answer: b. false
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Compared to the first big syphilis epidemic several hundred years ago in Europe, the strains of Treponema pallidum that cause syphilis today
A. tend to be more virulent. B. tend to be less virulent. C. are about equally virulent. D. cannot be compared.
The area of the angle between the stem and the petiole is referred to as the:a
axil. b. blade. c. petiole. d. stipule. e. trichome.
Streptococcus pyogenes is a human pathogen that is typically treatable with penicillin. Given this information, which of the following statements is true?
A. S. pyogenes is a gram negative bacterium B. S. pyogenes cells are spheres C. S. pyogenens is a protist D. S. pyogenes is in the domain, Archaea E. Answers A and B F. Answers B and D
How does DNA polymerase differ from RNA polymerase?
A. Only DNA polymerase uses a template DNA strand to direct synthesis of a new nucleotide strand. B. Only DNA polymerase has a proofreading ability. C. Only RNA polymerase adds new nucleotides to the 3' end of a growing chain. D. Only RNA polymerase requires a primer.