Research and analysis has documented that Muller's ratchet works ________
A) in mathematical modeling
B) in empirical studies
C) in a natural setting
D) All of the above.
D
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When Lactobacillus acidophilus are sprayed on feed, the cattle that eat it appear to have markedly lower carriage of the pathogenic E. coli strain O157:H7.
Answer the following statement true (T) or false (F)
The first known primates were characterized as
a. arboreal and nocturnal. b. ground-dwelling and nocturnal. c. arboreal and diurnal. d. ground-dwelling and diurnal. e. none of these.
Which of the following events occurs initially when Escherichia coli cells are in a gradient of a chemorepellent?
A. CheY is phosphorylated B. Cells tumble C. CheA autophosphorylates D. Flagella rotate clockwise
In the brain stem, motor nuclei belong to the ____ plate and are ____ to the sensory nuclei of the ____ plate.
A. Alar; Lateral; Basal B. Alar; Medial; Basal C. Basal; Lateral; Alar D. Basal; Medial; Alar E. Basal; Caudal; Alar