Which of the Following Statements About the Evolution of Animal

question 92

Multiple Choice

Which of the following statements about the evolution of animal cell adhesion molecules is TRUE?

• A)The genes for integrins are found in all opisthokonts, including animals, plants, and fungi.
• B)Animal cell adhesion molecules evolved from protein families that originally performed other functions.
• C)The genes for cadherins are only found in animals.
• D)The genes for integrins are found only in multicellular organisms.
• E)All of these choices are correct.

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Definitions:

Bridge

A structure built to span a physical obstacle, such as a body of water, valley, or road, without blocking the way underneath.

Base Level

The lowest point to which erosion by running water can occur, often the level at which a river meets the sea or lake.

Climate

The long-term pattern of weather in a particular area, typically averaged over a period of 30 years.

Stream-Cut Canyon

A deep valley formed through the prolonged action of a stream cutting through the terrain, often displaying steep sides.