Which of the following is a North American
biome that has mostly disappeared because of
extensive farming of wheat and corn?
a. chaparral
b. grasslands
c. boreal forest
d. desert
e. more than one of these
B
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Which two organisms should be used to determine the validity of urea agar for quality control purposes?
a. P. fluorescens and B. cepacia complex b. Ralstonia mannitolilytica and Acidovorax delafieldii c. Brevundimonas diminuta and Brevundi-monas vesicularis d. B. vesicularis and R. pickettii
Runners are modified stems that resemble roots and
are also known as a. stolons. b. rhizomes. c. bulbs. d. corms. e. tubers.
Which one of the following ions outside the neuron would make it very difficult for a depolarization to occur?
A) potassium B) sodium C) chloride D) manganese
In combination with homologous recombination, the CRISPR/Cas system can be used to accomplish
A) gene fusions. B) gene deletion. C) point mutations. D) DNA cloning. E) gene fusions, gene deletions, or point mutations.