Bacteria in the genus Salmonella are frequent causes of serious food contamination. Which of the following methods would provide rapid confirmation that a Salmonella species was a contaminant in food suspected of causing food "poisoning"?
A. phage typing
B. biochemical tests
C. physical characteristics
D. analysis of nucleic acids
E. serological tests
Answer: A
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The point of constriction on chromosomes that contains certain repeated DNA sequences that bind specific proteins is called:
A. The kinetochore B. The centromere C. The cohesin complex D. The centriole E. The centrosome
A continuously varying trait is
A) cystic fibrosis. B) seed color in pea plants. C) extra fingers and toes. D) weight in humans.
The hormone that controls the concentration of urine is:
a. insulin b. glucagon c. antidiuretic hormone d. thyroxine e. epinephrine
The relationship above is
a. a parasitic association. b. predation. c. resource partitioning. d. a mutualistic association. e. none of these.