A news article discussing the evolution of domestic dogs from wolves included this statement: "On its way from pack-hunting carnivore to fireside companion, dogs learned to love—or at least live on—wheat, rice, barley, corn, and potatoes." What is a
more scientifically accurate way to state what happened with dogs?
A) Dogs' DNA mutated so that they could eat wheat, rice, barley, corn, and potatoes.
B) Some wolves may have had variants in their digestion that allowed them to eat wheat, rice, barley, corn, and potatoes and so were able to survive with humans.
C) Being around humans represented an advantage, so wolves were able to take advantage of that by changing their digestion to be able to eat wheat, rice, barley, corn, and potatoes.
D) Dogs were created at the same time as wolves.
Answer: B
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In 1952, Hershey and Chase confirmed Avery's (1944) conclusion that
A. proteins are the repositories for hereditary information. B. DNA is the repository for hereditary information. C. RNA is the repository for hereditary information. D. each DNA molecule is composed of two strands that are twisted into a double helix. E. the replication of DNA is semiconservative.
Phenotypic similarities that provide no information about shared ancestry are called
a. homologies. b. homoplasies. c. morphological. d. anatomical. e. mosaic characters.
In prokaryotes, control of gene expression is mainly at the level of ____
a. transcription b. transcript processing c. transport d. translation e. post-translation
Traditionally, toxicology studies have involved numerous bioassays on rodents. However, a more reliable and reproducible approach to study the genome-wide effects of a toxin is
A. functional genomics. B. a protein microarray. C. a yeast two-hybrid screen. D. a DNA microarray.