A Large Proportion of Archaeans Are Extremophiles, So Called Because

question 15

Multiple Choice

A large proportion of archaeans are extremophiles, so called because they inhabit extreme environments with high acidity, salinity, and/or temperature. Such environments are thought to have been much more common on primitive Earth. Thus, modern extremophiles survive only in places that their ancestors became adapted to long ago. Which of the following is, consequently, a valid statement about modern extremophiles, assuming that their habitats have remained relatively unchanged?

• A) Among themselves, they should share relatively few ancestral traits, especially those that enabled ancestral forms to adapt to extreme conditions.
• B) On a phylogenetic tree whose branch lengths are proportional to the amount of genetic change, the branches of the extremophiles should be shorter than the non-extremophilic archaeans.
• C) They should contain genes that originated in eukaryotes that are the hosts for numerous species of bacteria.
• D) They should currently be undergoing a high level of horizontal gene transfer with non-extremophilic archaeans.

Differentiate between emotional and rational appeals in advertising.

Craft a unique selling proposition for a product or service.

Determine appropriate advertising schedules based on business seasonality and objectives.

Evaluate the advantages and disadvantages of television advertising for local businesses.

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Definitions:

Backward-Bending

Refers to the portion of a labor supply curve that bends backward at higher wage levels, indicating a decrease in labor supply as wages increase beyond a certain point.

Substitution Effect

The change in consumption patterns due to a change in the relative prices of goods, leading consumers to substitute one good for another.

Income Effect

Shifts in economic or personal income and how these shifts influence the demand for certain goods or services.

Disparity of Income

The gap in income and wealth distribution among individuals or groups within a society, leading to economic inequality.