Phenotypic similarities that provide no information about shared ancestry are ____
a. homologies
b. homoplasies
c. morphological
d. anatomical
e. physiological
ANSWER: b
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In a ribbon model of a polypeptide, broad arrows indicate:
A. -sheets. B. -helices. C. disulfide linkages. D. -sheets and -helices. E. All of these choices are correct.
During the citric acid cycle, the production of CO2 is a(n) _____ reaction coupled to the production of ____________
A. oxidation; NADH B. oxidation; ATP C. reduction;, NADH D. reduction; ATP E. oxidation; GTP
Recent studies have shown that some Clostridia species have peptidoglycan between an inner and outer membrane, and were therefore properly reclassed as Gram-negative because of their unrelatedness.
Answer the following statement true (T) or false (F)
A researcher in a lab finds a microscopic organism that has no nucleus, but has distinctive structural
molecules and mechanisms of photosynthesis. The organisms are abundant in virtually every habitat on Earth. The researcher has identified an organism belonging to the domain ____.
a. Bacteria b. “Protist” c. Eukarya d. Animalia e. Amoeba