The Three Lines of Defence Against Invasion Are: 1) Adaptive

question 11

Multiple Choice

The three lines of defence against invasion are: 1) adaptive immune system, 2) physical barriers, and 3) innate immune system. Which sequence of numbers places the three lines of defence in order, from earliest to latest?

• A)3, 2, 1
• B)2, 1, 3
• C)2, 3, 1
• D)3, 1, 2

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Definitions:

Standard Deviation

A statistical metric that quantifies the dispersion or variability of a dataset relative to its mean.

Mean

The average of a set of numbers, calculated by dividing the sum of the values by the number of values.

Standard Normal Variable

A standard normal variable is a random variable that follows a normal distribution with a mean of zero and a standard deviation of one.

Standard Normal Distribution

A normal distribution with a mean of 0 and a standard deviation of 1, serving as a basis for comparison for other distributions.