A positive Quellung reaction, or capsular swelling, is confirmatory for:
A. Neisseria meningitidis.
B. Staphylococcus aureus.
C. Streptococcus pyogenes.
D. Branhamella (Moraxella) catarrhalis.
E. Streptococcus pneumoniae.
Answer: E. Streptococcus pneumoniae.
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Blue flower color (B allele) is dominant to white (b allele). In a population plants with white flowers (bb) are at a frequency of 0.04. What frequency of the alleles are for blue flower color (B)?
A. 0.04 or 4% B. 0.16 or 16% C. 0.06 or 60% D. 0.8 or 80% E. 0.96 or 96%
Place the following in developmental order beginning with the earliest event
1) limb buds appear 2) face begins to look human 3) muscles differentiate 4) downy hair covers the fetus 5) sex can be determined by external inspection a. 3, 1, 2, 4, 5 b. 1, 3, 4, 2, 5 c. 1, 3, 2, 5, 4 d. 1, 2, 3, 4, 5 e. 1, 3, 5, 2, 4
A sugar with three carbon atoms is a
A. triose sugar. B. trisaccharide. C. triglyceride. D. tripeptide.
Viruses replicate by.
A) binary fission. B) budding of a daughter cell from the parent cell. C) producing reproductive spores. D) using a host cell to produce and assemble components.