Which of the following pairs indicates the closest
macroevolutionary link among the plants according
to the evolutionary history tree in the text?
a. lycophytes; ferns
b. whisk ferns; horsetails
c. lycophytes; mosses
d. hornworts; horsetails
e. ferns; ginkgos
Answer: b
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Is Nakano's quote from Science consistent with the textbook's claim that RNA is a good candidate for the first life form?
A) yes B) no
Which of the following produce lactic acid?
A. Lactobacillus B. Leuconostoc C. Streptococcus D. Lactococcus E. All of the choices are correct
The power used by most bacterial flagellar motors is produced by
A. synthesis of glucose. B. proton motive force (PMF). C. ATP hydrolysis. D. All of the choices are correct.
How do normal prion proteins (PrP) differ from the infectious prion proteins?
a. Normal PrP have alpha-helices; infectious PrP have beta-pleated sheets. b. Normal PrP are found in all mammals; infectious PrP are found in only cows. c. Normal PrP lack nucleic acid; infectious PrP have nucleic acid. d. Normal PrP are found on mammals; infectious PrP are found on reptiles.