Which Is Not an Example of Virulence as an Evolving

question 5

Multiple Choice

Which is not an example of virulence as an evolving property?

• A) Cold viruses which generate more coughs and sneezes while allowing the host to remain mobile will have an evolutionary advantage over those that cause their host to be bedridden.
• B) As hosts evolve more effective defenses against a given pathogen, the pathogen in turn will evolve virulence factors to combat those defenses.
• C) Historically, smallpox appeared to shift from a highly virulent pathogen which killed its victims quickly to one that did not kill immediately but more easily spread from person to person.
• D) The 1918 influenza pandemic primarily killed young adults rather than elderly persons which is more typical of influenza both before and after that time.
• E) Each of these is an example of virulence as an evolving property.

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Definitions:

Law of Demand

The Law of Demand states that, all else being equal, as the price of a good increases, the demand for that good decreases, and conversely, as the price decreases, demand for the good increases.

Price Ceiling

A government-imposed limit on how high a price can be charged for a product, service, or commodity, usually intended to protect consumers from excessive costs.

Economic Effects

The consequences of a particular policy or economic event on the welfare of the economy.

Price Floor

A government-imposed minimum price for a product or service, intended to prevent prices from falling below a certain level.