Which of the following is NOT true of Epsilonproteobacteria?
A) Abundance directly correlates with sulfur metabolism activities.
B) Pathogens require relatively low O2 levels to grow.
C) Epsilonproteobacteria are present in freshwater, marine systems, and terrestrial environments.
D) Epsilonproteobacteria are prolific metal reducers.
Answer: D
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Bacteria stain as gram-positive or gram-negative because of differences in the cell
A) wall. B) cytoplasm. C) nucleus. D) chromosome.
Generally, a pair of homologous chromosomes __________.
A) carry the same genes B) are the same length, shape C) interact at meiosis D) all of these choices
The endogeneity problem that results from when a variable correlated with the treatment is not included as a control variable is known as the:
A. instrumental variable. B. weak instruments problem. C. omitted variable bias. D. least efficient estimator.
Lipids play a major role in cells as
a. a form of energy storage. b. components of cell membranes. c. part of the cell signaling function. d. All of the above