Which of the following groups can be
distinguished from other arthropods by its two
pairs of antennae?
a. insects
b. millipedes
c. chelicerates
d. crustaceans
e. trilobites
D
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Transparent double-sided dishes used for growing microbes are most commonly called
A) Petri dishes. B) baker dishes. C) sterilization plates. D) culture medium plates.
The monomer subunit of immunoglobulin molecules has all of the following except
A. a variable and constant region on each polypeptide chain. B. disulfide bonds between polypeptide chains. C. four antigen binding sites. D. two identical heavy polypeptide chains. E. two identical light polypeptide chains.
Franklin's assignment at Cambridge was to investigate the structure of ____.
A. proteins B. ultraviolet radiation C. DNA D. embryonic fluid E. lipids
How did some strains of Staphylococcus aureus become resistant to antibiotic drugs?
a. Patients did not take the drug as it was prescribed. b. Bacteria mutated in response to the drug. c. None of the listed responses are correct. d. Some members of the bacteria population must have had genes that made them resistant to antibiotics, and these genes became more prevalent in subsequent generations. e. The drug did not work in the way that the developers intended.