After incubation, Salmonella typhimurium TA 1538 colonies found on the control plate with the filter paper disk saturated with water (the negative control) are _________.
A) auxotrophic for histidine
B) prototrophs
B) prototrophs
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Synaptic potentials are due to the opening
a. voltage-gated ion channels b. chemically-gated ion channels
People who see themselves as fat no matter how thin they become are suffering from
a. anorexia nervosa. b. bulimia. c. obsessive compulsive disorder. d. oppositional defiance disorder. e. passive-aggressive disorder.
A collection of clones containing all the DNA sequences carried by an individual is called a(n)
____________________. Fill in the blank(s) with the appropriate word(s).
Which of the following represents the proper order of events in embryonic development?
A. fertilization; gastrulation; neurulation; cleavage; organogenesis B. fertilization; gastrulation; cleavage; neurulation; organogenesis C. fertilization; cleavage; gastrulation; neurulation; organogenesis D. fertilization; gastrulation; cleavage; organogenesis; neurulation E. fertilization; cleavage; gastrulation; organogenesis; neurulation