Biologists Studying a Clade of Birds Are Interested in Whether

question 106

Multiple Choice

Biologists studying a clade of birds are interested in whether a morphological feature of this clade is ancestral or derived.Which approach would best address this question?

• A) More detailed morphological analysis of that trait, such as can be determined with a CT scanner
• B) Determining the genetic basis of the trait
• C) Use of the fossil record, especially near the root of the tree
• D) Focusing on the ingroup
• E) DNA analysis

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Definitions:

Marginal Revenue

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

Demand Curve

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

Elastic Segment

A portion of the demand curve where consumers are highly responsive to changes in price, indicating elasticity.

Total Revenue

The total amount of money received by a company for goods sold or services provided during a specific period.