The Following Questions Refer to This Phylogenetic Tree, Depicting the Origins

question 25

Multiple Choice

The following questions refer to this phylogenetic tree, depicting the origins of life and of the three domains. Horizontal lines indicate instances of gene or genome transfer.

-Which portion of this tree may ultimately be better depicted as a "ring"?

• A)the bacterial lineage
• B)the archaean lineage
• C)the eukaryotic lineage
• D)the weblike part near the base of the tree
• E)the part corresponding to the first living cell on Earth

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Definitions:

Opportunity Cost

The dues for not selecting the following most suitable option when making decisions.

Point D

Another specific point on a graph or economic model, indicative of a different state or condition than Point C, useful in comparative analysis.

Point C

Typically used in economics and finance as a specific point on a graph illustrating an equilibrium, costing or other calculated value.

Production Possibilities Curve

A graphical representation that shows the maximum combination of two goods or services that can be produced with available resources and technology.