Which One of the Following Statements About the Trypanosome Causing

question 6

Multiple Choice

Which one of the following statements about the trypanosome causing African sleeping sickness does not explain why the disease has been difficult to control?

• A)Trypanosomes have a protective glycoprotein coat.
• B)Trypanosomes have many variable antigen genes.
• C)Rearrangement of antigen genes takes place during the asexual cycle.
• D)By infesting the red blood cells, trypanosomes can "hide" from the immune system.

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Definitions:

Prediction Interval

A range of values that is likely to contain the value of an unknown parameter for future observations.

Expected Value

The anticipated value of a variable, computed as the sum of all possible values each multiplied by the probability of its occurrence, used in probability and statistics.

Confidence Interval Estimate

A spectrum of values, drawn from sample statistics, projected to embrace the value of an undefined population measure.

Standard Error

A statistical measure that quantifies the variability or dispersion of a sample statistic from the population parameter.