A Phylogenetic Tree Is Shown for the Three Domains of Life

question 26

Multiple Choice

A phylogenetic tree is shown for the three domains of life (Eukarya, Archaea, and Bacteria) . The tree branches in two directions from the first point, labeled Common ancestor of all life. One branch leads in the direction of Eukarya and Archaea, and the other branch leads to Bacteria. The branch leading to Eukarya and Archaea divide, one branch leading to each domain. The branch leading to Eukarya divides into four branches. One leads to Euglenozoans, and the other three lead to branching points. The first leads to Forams in one direction, and another branching point in the other that leads to Diatoms and Ciliates. The second branching point leads to Red algae in one direction, and a branching point that leads to green algae and land plants in the other direction. The third branching point leads to amoebas in one direction, and a branching point that leads to fungi and animals in the other direction. Land plants, Fungi and Animals are all highlighted.
Cyanobacteria were once called blue-green algae because they are photosynthetic. According to the phylogeny shown, the cyanobacteria are more closely related to gram-positive bacteria than to ________.

• A) proteobacteria
• B) green algae
• C) euglenozoans
• D) crenarcheotes

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Definitions:

Earnings Per Common Share

A measure of a company's profitability that calculates the net income available to common shareholders per share of common stock outstanding.

Indirect Method

A method of reporting the cash flows from operating activities that begins with net income and adjusts for revenues and expenses that do not involve the receipt or payment of cash.

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Net Income

The total profit or loss of a company after all revenues, expenses, taxes, and costs have been accounted for, typically reported on the bottom line of the income statement.