Find the Indicated Probability If One of the 255 Subjects Is Randomly Selected, Find

question 57

Multiple Choice

Find the indicated probability.
-The table below shows the soft drink preferences of people in three age groups. $\begin{array}{r|ccc} & \text { cola } & \text { root beer } & \text { lemon-lime } \\\hline \text { under 21 years of age } & 40 & 25 & 20 \\\text { between 21 and 40 } & 35 & 20 & 30 \\\text { over 40 years of age } & 20 & 30 & 35\end{array}$

If one of the 255 subjects is randomly selected, find the probability that the person is over 40 years of age.

• A) \(\frac { 1 } { 3 }\)
• B) \(\frac { 3 } { 5 }\)
• C) \(\frac { 1 } { 2 }\)
• D) \(\frac { 2 } { 5 }\)

Know the factors contributing to postnatal brain growth and their biological underpinnings.

Identify epigenetic changes that can affect gene expression.

Understand the impact of external environmental factors on fetal brain development.

Describe the role of the hypothalamic-pituitary-adrenal axis in stress response.

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Definitions:

Biological Magnification

The increased concentration of toxic chemicals, such as PCBs, heavy metals, and certain pesticides, in the tissues of organisms at higher trophic levels in food webs.

Bioconcentration

The accumulation of a substance in the tissues of living organisms at higher concentrations than in the surrounding environment.

Pesticide Treadmill

A situation where farmers must continuously use more and different chemicals to control pests that have developed resistance to pesticides.

Net Primary Productivity

The rate at which all the plants in an ecosystem produce net useful chemical energy; essentially, it is the amount of energy that is available to the primary consumers in an ecosystem.