Which of the following statements about measles is incorrect?
A. Humans are the only reservoir for the pathogen.
B. Secondary bacterial otitis media and sinusitis can occur.
C. Dry cough, sore throat, fever, and conjunctivitis are symptoms.
D. It may involve a fatal complication called subacute sclerosing panencephalitis (SSPE).
E. It is transmitted by direct contact with the rash.
Answer: E
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Which of the following is not a characteristic of a riboswitch?
A. They are structures that can form in the 5' untranslated region of some mRNA molecules. B. They exert gene expression control only at the level of translation. C. They may physically bind to small-molecule metabolites. D. Ligand-binding to a riboswitch may sequester the Shine-Dalgarno sequence.
The freshwater leech is an organism that feeds off of the blood of other organisms such as frogs and turtles. Which interaction describes the relationship between freshwater leeches and frogs or turtles?
A) herbivory B) predation C) mutualism D) parasitism
This question refers to the 5-stage process of hypothesis testing. What is the appropriate order of the stages when generating and testing a hypothesis?
(1) Experimentation is conducted to determine if the predictions are correct. (2) The hypothesis is accepted or rejected. (3) Observations are made regarding a natural phenomenon. (4) The observations lead to a hypothesis that tries to explain the phenomenon. A useful hypothesis is one that is testable because it makes specific predictions. (5) The data from the experiment is analyzed. A. 1, 2, 3, 4, 5 B. 3, 4, 5, 1, 2 C. 1, 3, 4, 2, 5 D. 3, 4, 1, 5, 2 E. 3, 4, 2, 1, 5
The first intelligence tests, developed in the late 19th century, tested a person's
A) mathematics and verbal skills. B) sensory perception and reaction time. C) problem-solving and logic skills. D) hand-eye coordination.