Which of the following statements, concerning an acidic solution, is false?
A) In acidic solutions, as the concentration of hydrogen ions increases the solution becomes more acidic
B) In acidic solutions, any value of the pH scale above 7 is considered acidic
C) Microorganisms can grow in acidic solutions
B) In acidic solutions, any value of the pH scale above 7 is considered acidic
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In a randomized, controlled, double-blind study:
A) neither the experimenter nor the subject know whether the subject is in a control group or an experimental group. B) individuals will be assigned to an experimental or control group depending on whether or not they took part in a pilot study. C) experimental subjects are blindfolded when given the experimental treatment. D) all experimental groups are filled randomly using no particular criteria. E) the experimenter knows which subjects are in the experimental group but not the control group.
Energy to perform prolonged, endurance exercise is produced from the anaerobic energy system.
a. true b. false
During sporulation in Bacillus subtilis, inactive precursor forms of new sigma factors are activated at the appropriate time by which mechanism?
A. Phosphorylation B. RNA-binding C. Chaperone refolding D. Proteolysis
Cephalization is
A. concentration of the sensory organs on the anterior end of the body. B. embryonic development of the head in advance of the rest of the body. C. a malformation of the head. D. an evolutionary degeneration of the head as seen in some parasites. E. concentration of the sensory organs on the posterior end of the body.