The Following Questions Refer to the Evolutionary Tree in Figure

question 66

Multiple Choice

The following questions refer to the evolutionary tree in Figure 22.4,whose horizontal axis represents time (present time is on the far right) and whose vertical axis represents morphological change.
Figure 22.4
-Which conclusion can be drawn from this evolutionary tree?

• A)Gradualistic speciation and speciation involving punctuated equilibrium are mutually exclusive concepts.
• B)Eldredge and Gould would deny that the lineages labeled X,Y,and Z could represent true species.
• C)Assuming that the tip of each line represents a species,there are five extant (that is,not extinct)species resulting from the earliest common ancestor.
• D)A single clade (that is,a group of species that share a common ancestor)can exhibit both gradualism and punctuated equilibrium.

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Definitions:

Marginal Profit

The increase in profit that results from selling one additional unit of a product or service.

Technological Progress

The development and application of innovative techniques, machinery, and software to improve efficiency, productivity, and products.

Marginal Product

The extra production created by the inclusion of an additional unit of a certain input, while keeping all other inputs unchanged.

Female Employment

The participation of women in the workforce or labor market.