During what eon were dinosaurs and gymnosperms the dominant organism?
a. cenozoic
b. archaean
c. mesozoic
d. phanerozoic
e. jurassic
Ans: d. phanerozoic
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The phylogenetic species concept (PSC) declares that a group is a species if it
A. is reproductively isolated from other species. B. has evolved one or more of its own derived characters. C. looks different than other species. D. is allopatric. E. has no synapomorphies.
If a scientist were studying the interaction of different proteins in the regulation of insulin secretion from a pancreatic cell, he or she would be studying
A. genomics. B. proteomics. C. cell biology. D. both genomics and proteomics. E. both proteomics and cell biology.
An ALDH2 allele results in slow alcohol metabolism, leading to an accumulation of acetaldehyde. Therefore, individuals with this allele tend to _____
a. consume more alcohol than typical social drinkers b. be protected against alcoholism c. become alcoholics at high rates d. contain other alleles that protect against alcoholism e. have parents who are alcoholics
Antigens interact with antibodies at
A. the outer end of each arm of the Y. B. the junction of heavy and light chains. C. different regions depending on the class of antibody. D. the bottom stem of the heavy chain of the Y.