Hemolytic uremic syndrome is caused by
A) Escherichia coli O157:H7.
B) Serratia marcescens.
C) Proteus mirabilis.
D) Bacteroides fragilis.
E) Salmonella typhi.
A
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Homologous chromosomes pair along their length during prophase I of meiosis. While two homologues are paired, genetic exchange may occur between them in a process called ________.
A. syngamy B. synapsis C. independent assortment D. crossing over
Oligosaccharides include
a. sucrose. b. glucose. c. fructose. d. lactose e. both sucrose and lactose.
Cancer is a disorder in which some cells have lost the ability to control their
A. volume. B. surface area. C. size. D. spindle fibers. E. rate of cell division.
Smooth muscle is responsible for
A) voluntary body activities. B) the pumping action of the heart. C) an athlete's ability to run a 100-meter dash. D) involuntary body activities.