Viruses Cannot Reproduce on Their Own; They Do So by Taking

question 73

Multiple Choice

Viruses cannot reproduce on their own; they do so by taking over the machinery that exists in the cells of the organisms they invade,whether those organisms are bacteria,plants,or animals.Vaccinations can provide lifelong protection against some diseases,but flu vaccines are rarely effective against the next year's flu virus.Which of the following statements is most likely to explain this fact?

• A) Viruses are not alive.
• B) Viruses can evolve quickly.
• C) A virus can change its cell membranes to block the action of the vaccine.
• D) Viruses can develop into immune bacteria that neutralize the action of the vaccine.

Differentiate between various types of psychological tests.

Comprehend the principles of test development, including validity.

Recognize the stability and predictive power of IQ scores over time.

Identify the factors influencing intelligence and creativity.

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Definitions:

Chip Dip

A variety of sauces or seasonings into which chips are dipped to enhance their flavor.

Substitute Goods

Products or services that can serve as replacements for each other; when the price of one increases, the demand for the alternative typically increases.

Birth Rate

The number of live births per thousand people in a population over a given period of time.

Demand Curve

A graph showing the relationship between the price of a good and the amount of it that consumers are willing to purchase at different prices.