Which of the following results when ethanol is allowed to oxidize to acetic acid following the fermentation of fruit, grain, or vegetables?
A) beer
B) wine
C) whey
D) vinegar
E) must
D
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A physical barrier that separates a population
in half and that leads to the evolution of a new species is called
a. sympatric speciation. b. allopatric speciation. c. directional selection. d. ecological isolation. e. behavioral isolation
Under which condition will a population experience growth?
A. when N equals K B. when N is less than K C. when dN/dt equals zero D. when r equals zero E. when N equals zero
Which of the following statements about the pathogen-specific response is true?
A. There is never a gene-for-gene response. B. If the R gene product is not triggered, no disease will occur. C. Avr and R gene pairs have been cloned in species pathogenized by microbes, fungi, and insects. D. The pathways involved always trigger the hypersensitive response. E. The pathogen is recognized by its avr gene product.
The endosymbiotic theory is supported by the work
of __________ on bacteria-infected Amoeba proteus. a. Stanley Miller b. Jeon Kwang c. Thomas Brock d. Lynn Margulis e. Australian researchers