The allergic response is primarily mediated by _____ antibodies.
A. IgG
B. IgM
C. IgA
D. IgE
E. IgD
D. IgE
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Which of the following is not a feature of the genetic code?
A) degenerate B) universal, with rare exception C) nonoverlapping D) triplet code E) each codon represents a different amino acid
Prokaryotic cell mutations can be observed very quickly because the prokaryotic chromosome is
A. diploid. B. polyploid. C. haploid. D. polysomal.
Which of the following statements is true of reptiles?
A. Eggs undergo external fertilization. B. Sperm are released in the vicinity of the female. C. Eggs have an amnion and a chorion. D. Larvae become adults by metamorphosis. E. Embryonic and fetal development in all species is only by oviparity.
In the cladogram shown, the animals across the top are a lancelet, lamprey, salmon, lizard, and rabbit (from left to right). If the salmon, lizard, and rabbit are an ingroup, which animals make up the outgroup, and which characteristics are synapomorphies of the ingroup? 
A. Lamprey and lancelet; notochord and vertebrae B. Lancelet, lamprey and salmon; notochord, vertebrae, and a hinged jaw. C. Lancelet and lamprey; hinged jaw. D. Lancelet only; notochord, vertebrae, hinged jaw, tetrapod, and mammary glands. E. Lizard and rabbit; tetrapod and mammary glands.