Instead of being isolated by pure culture, SAR11 was discovered when researchers analyzed the gene sequences contained within seawater samples
A. true
B. alse
A
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Enhanced phagocytosis of antibody-sensitized cells is known as
A) complementation. B) immunization. C) opsonization. D) tolerance.
Clostridium perfringens food poisoning leads to diarrhea, because the
A) toxin causes the shedding of the intestinal lining. B) permeability of the intestinal epithelium is altered by the toxin it produces. C) disease causes such extreme thirst that the patient drinks more water than can be absorbed. D) organism multiplies more rapidly than the immune system can handle.
Which of the following is not a fate of pyruvate within a cell?
A) fermentation B) anaerobic respiration C) gluconeogenesis D) alanine biosynthesis E) all of the above
Mouse pigmentation is subject to epistasis of the B alleles by the d alleles. B (black) is dominant over b (brown), and
D is dominant over d. Homozygous d is epistatic to the black and brown genes. Given this information, what will result from a F1 cross between two mice?
a. 9/16 black, 3/16 brown, 4/16 white b. 9/16 white, 3/16 brown, 4/16 black c. 9/16 black, 6/16 brown, 1/16 white d. 9/16 white, 6/16 brown, 1/16 black e. All black mice