Who discovered that DNA was the genetic material or transforming factor that could convert nonvirulent R-type Streptococcus pneumoniae bacterium to the virulent S-type?
A. Weismann and Nageli
B. Griffith
C. Avery, MacLeod, and McCarty
D. Hershey and Chase
E. Watson, Crick, Wilkins, and Franklin
C. Avery, MacLeod, and McCarty
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Saprobic fungi obtain nutrients from _____
a. nonliving organic matter c. living animals b. living plants d. living plants and living animals
Positional cloning is used to link the inheritance of a disease in a pedigree to the inheritance of _____
a. other diseases or conditions b. a specific blood type c. other genes whose loci were known d. marker sequences produced by restriction enzymes e. X-linked genes
In the section "Investigating Life: Birds Do, Bees Do It", what hypothesis did the researchers test?
A. Mutation in a single gene could cause a change in flower color and thus pollinator. B. Mutation in multiple genes over a long period of time is required to change flower color and pollinators. C. Pollinators do not choose which flowers to pollinate based on color. D. M. lewisii and M. cardinalis are the same species. E. M. lewisii and M. cardinalis are different species.
The water in which aquifer in the central United States is apparently being depleted more rapidly than it is being replenished, thus threatening the future of farming in certain regions?
A) Ogallala B) Texarkana C) Legumino D) Nebraskan