Answer the question using the accompanying figure. Which branch of this phylogenetic tree identifies a kingdom?
a. C
b. D
c. E
d. D and E
e. C, D, and E
ANSWER: a
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The type of Escherichia coli that produces a verotoxin similar to the one produced by Shigella dysenteriae is ________ E. coli
A) enterohemorrhagic B) enterotoxigenic C) enteropathogenic D) enteroimmunogenic
The E. coli origin, oriC, contains:
A. four 9-base-pair consensus sequences. B. three AT-rich direct repeats. C. eleven GATC sites. D. four 9-base-pair consensus sequences and three AT-rich direct repeats. E. four 9-base-pair consensus sequences, three AT-rich direct repeats, and eleven GATC sites.
Metagenomics offers a DNA-based method to understand
A. the history of species diversity. B. the time hypothesis. C. microbial diversity. D. the organismic model of Clements. E. the Shannon Diversity Index.
Which statement supports the theory that all organisms are related?
A) The genetic code is almost universal. B) All flies have two wings. C) Body parts with similar functions in different species are determined by unrelated genes. D) Prokaryotes have circular chromosomes.